From 555515588405a81489d477bdabbc51f931097691 Mon Sep 17 00:00:00 2001
From: Towsty <ianjmcarr@gmail.com>
Date: Wed, 2 Sep 2026 23:57:05 -0500
Subject: [PATCH] Add ACE-Step music generation to the studio and library.

Co-authored-by: Cursor <cursoragent@cursor.com>
---
 components/AppHeader.vue                    |   9 +-
 components/AudioPlayer.vue                  | 219 ++++++++++++
 nuxt.config.ts                              |   1 +
 pages/index.vue                             |  13 +-
 pages/library.vue                           | 102 +++++-
 pages/music.vue                             | 344 +++++++++++++++++++
 scripts/download_music_models.ps1           | 322 ++++++++++++++++++
 server/api/generate/active.get.ts           |   9 +-
 server/api/generate/music.post.ts           | 100 ++++++
 server/api/library/tracks/[id].delete.ts    |   8 +
 server/api/library/tracks/[id].patch.ts     |  18 +
 server/api/library/tracks/[id]/audio.get.ts |  19 ++
 server/api/media.get.ts                     |  14 +-
 server/assets/workflow_ace_step.json        | 120 +++++++
 server/utils/comfy.ts                       |  52 +++
 server/utils/jobs.ts                        |  22 +-
 server/utils/library.ts                     | 211 +++++++++++-
 server/utils/musicChain.ts                  | 352 ++++++++++++++++++++
 server/utils/musicWorkflow.ts               |  68 ++++
 server/utils/workflow.ts                    |   2 +
 utils/generationNotify.ts                   |   8 +-
 utils/libraryBrowse.ts                      |  59 +++-
 utils/libraryGeneration.ts                  |  31 ++
 utils/music.ts                              |  95 ++++++
 utils/outputNames.ts                        |   3 +
 25 files changed, 2157 insertions(+), 44 deletions(-)
 create mode 100644 components/AudioPlayer.vue
 create mode 100644 pages/music.vue
 create mode 100644 scripts/download_music_models.ps1
 create mode 100644 server/api/generate/music.post.ts
 create mode 100644 server/api/library/tracks/[id].delete.ts
 create mode 100644 server/api/library/tracks/[id].patch.ts
 create mode 100644 server/api/library/tracks/[id]/audio.get.ts
 create mode 100644 server/assets/workflow_ace_step.json
 create mode 100644 server/utils/musicChain.ts
 create mode 100644 server/utils/musicWorkflow.ts
 create mode 100644 utils/music.ts

diff --git a/components/AppHeader.vue b/components/AppHeader.vue
index 20af8af..34b020c 100644
--- a/components/AppHeader.vue
+++ b/components/AppHeader.vue
@@ -55,6 +55,13 @@
             role="menuitem"
             @click="menuOpen = false"
           >Director</NuxtLink>
+          <NuxtLink
+            to="/music"
+            class="block rounded-xl px-3 py-2 text-sm hover:bg-white/5 hover:text-white"
+            :class="current === 'music' ? 'text-amber-100' : 'text-zinc-200'"
+            role="menuitem"
+            @click="menuOpen = false"
+          >Music</NuxtLink>
           <button
             type="button"
             class="block w-full rounded-xl px-3 py-2 text-left text-sm hover:bg-white/5 disabled:cursor-not-allowed disabled:opacity-50"
@@ -116,7 +123,7 @@
 <script setup lang="ts">
 withDefaults(defineProps<{
   subtitle: string
-  current?: 'studio' | 'library' | 'director' | 'queue' | 'settings'
+  current?: 'studio' | 'library' | 'director' | 'queue' | 'settings' | 'music'
   wide?: boolean
   queueCount?: number
 }>(), {
diff --git a/components/AudioPlayer.vue b/components/AudioPlayer.vue
new file mode 100644
index 0000000..f0e62d4
--- /dev/null
+++ b/components/AudioPlayer.vue
@@ -0,0 +1,219 @@
+<template>
+  <div class="space-y-3">
+    <div class="overflow-hidden rounded-2xl border border-white/10 bg-zinc-950/80 p-3">
+      <canvas
+        ref="canvasEl"
+        class="h-16 w-full cursor-pointer"
+        height="64"
+        @click="onWaveClick"
+      />
+      <input
+        type="range"
+        class="aigen-slider mt-2 w-full"
+        min="0"
+        :max="Math.max(duration, 0.01)"
+        step="0.01"
+        :value="current"
+        :disabled="!ready"
+        :aria-label="label || 'Playback'"
+        @input="onScrub"
+      >
+    </div>
+    <div class="flex flex-wrap items-center gap-2">
+      <button
+        type="button"
+        class="rounded-full border border-amber-300/40 bg-amber-400/10 px-3 py-1.5 text-xs font-semibold text-amber-100 disabled:opacity-50"
+        :disabled="!ready"
+        @click="toggle"
+      >
+        {{ playing ? 'Pause' : 'Play' }}
+      </button>
+      <p class="min-w-[6.5rem] text-xs tabular-nums text-zinc-400">{{ clock }}</p>
+      <label class="ml-auto flex items-center gap-2 text-xs text-zinc-400">
+        Vol
+        <input
+          v-model.number="volume"
+          type="range"
+          class="aigen-slider w-24"
+          min="0"
+          max="1"
+          step="0.01"
+          aria-label="Volume"
+        >
+      </label>
+      <a
+        v-if="src"
+        :href="src"
+        :download="downloadName"
+        class="rounded-full border border-white/10 px-3 py-1.5 text-xs text-zinc-300 hover:text-white"
+      >Download</a>
+    </div>
+    <audio
+      ref="audioEl"
+      :src="src || undefined"
+      preload="metadata"
+      class="hidden"
+      @loadedmetadata="onMeta"
+      @timeupdate="onTime"
+      @ended="playing = false"
+      @error="onError"
+    />
+    <p v-if="error" class="text-xs text-red-300">{{ error }}</p>
+  </div>
+</template>
+
+<script setup lang="ts">
+const props = withDefaults(defineProps<{
+  src: string
+  downloadName?: string
+  label?: string
+}>(), {
+  downloadName: 'track.flac',
+  label: ''
+})
+
+const audioEl = ref<HTMLAudioElement | null>(null)
+const canvasEl = ref<HTMLCanvasElement | null>(null)
+const current = ref(0)
+const duration = ref(0)
+const playing = ref(false)
+const ready = ref(false)
+const error = ref('')
+const volume = ref(0.9)
+const peaks = ref<number[]>([])
+
+const clock = computed(() => `${fmt(current.value)} / ${fmt(duration.value)}`)
+
+function fmt(seconds: number) {
+  if (!Number.isFinite(seconds) || seconds < 0) return '0:00'
+  const m = Math.floor(seconds / 60)
+  const s = Math.floor(seconds % 60)
+  return `${m}:${String(s).padStart(2, '0')}`
+}
+
+function toggle() {
+  const audio = audioEl.value
+  if (!audio) return
+  if (playing.value) {
+    audio.pause()
+    playing.value = false
+    return
+  }
+  void audio.play().then(() => { playing.value = true }).catch(() => {
+    error.value = 'Could not play this file'
+  })
+}
+
+function onMeta() {
+  const audio = audioEl.value
+  if (!audio) return
+  duration.value = audio.duration || 0
+  ready.value = true
+  error.value = ''
+  void decodeWave()
+}
+
+function onTime() {
+  const audio = audioEl.value
+  if (!audio) return
+  current.value = audio.currentTime || 0
+  draw()
+}
+
+function onScrub(event: Event) {
+  const audio = audioEl.value
+  if (!audio) return
+  const next = Number((event.target as HTMLInputElement).value)
+  audio.currentTime = next
+  current.value = next
+  draw()
+}
+
+function onWaveClick(event: MouseEvent) {
+  const canvas = canvasEl.value
+  const audio = audioEl.value
+  if (!canvas || !audio || !duration.value) return
+  const rect = canvas.getBoundingClientRect()
+  const ratio = Math.min(1, Math.max(0, (event.clientX - rect.left) / rect.width))
+  audio.currentTime = ratio * duration.value
+  current.value = audio.currentTime
+  draw()
+}
+
+function onError() {
+  ready.value = false
+  error.value = 'Could not load this audio file'
+}
+
+function draw() {
+  const canvas = canvasEl.value
+  if (!canvas) return
+  const ctx = canvas.getContext('2d')
+  if (!ctx) return
+  const width = canvas.clientWidth || 320
+  const height = canvas.height
+  if (canvas.width !== width) canvas.width = width
+  ctx.clearRect(0, 0, width, height)
+  const samples = peaks.value.length ? peaks.value : Array.from({ length: 80 }, () => 0.12)
+  const barW = Math.max(1, width / samples.length)
+  const progress = duration.value > 0 ? current.value / duration.value : 0
+  samples.forEach((amp, index) => {
+    const x = index * barW
+    const h = Math.max(2, amp * (height - 8))
+    const y = (height - h) / 2
+    ctx.fillStyle = (index / samples.length) <= progress ? '#fbbf24' : 'rgba(255,255,255,0.18)'
+    ctx.fillRect(x, y, Math.max(1, barW - 1), h)
+  })
+}
+
+async function decodeWave() {
+  if (!props.src || typeof window === 'undefined') return
+  try {
+    const res = await fetch(props.src)
+    if (!res.ok) return
+    const buf = await res.arrayBuffer()
+    const ctx = new AudioContext()
+    const decoded = await ctx.decodeAudioData(buf.slice(0))
+    await ctx.close()
+    const data = decoded.getChannelData(0)
+    const buckets = 120
+    const size = Math.floor(data.length / buckets) || 1
+    const next: number[] = []
+    for (let i = 0; i < buckets; i++) {
+      let sum = 0
+      const start = i * size
+      for (let j = 0; j < size; j++) sum += Math.abs(data[start + j] || 0)
+      next.push(Math.min(1, (sum / size) * 3.2))
+    }
+    peaks.value = next
+    draw()
+  } catch {
+    draw()
+  }
+}
+
+watch(() => props.src, () => {
+  current.value = 0
+  duration.value = 0
+  playing.value = false
+  ready.value = false
+  error.value = ''
+  peaks.value = []
+  draw()
+})
+
+watch(volume, (value) => {
+  if (audioEl.value) audioEl.value.volume = value
+})
+
+onMounted(() => {
+  if (audioEl.value) audioEl.value.volume = volume.value
+  draw()
+  window.addEventListener('resize', draw)
+})
+
+onBeforeUnmount(() => {
+  window.removeEventListener('resize', draw)
+  audioEl.value?.pause()
+})
+</script>
diff --git a/nuxt.config.ts b/nuxt.config.ts
index 7df42e1..695c4c5 100644
--- a/nuxt.config.ts
+++ b/nuxt.config.ts
@@ -58,6 +58,7 @@ export default defineNuxtConfig({
     backupIngestToken: process.env.BACKUP_INGEST_TOKEN || 'carr-aigen-xaigen-backup',
     purgeComfyOutputs: process.env.PURGE_COMFY_OUTPUTS !== 'false',
     comfyFilenamePrefix: process.env.COMFY_FILENAME_PREFIX || 'video/MiniMax_H3',
+    comfyAudioPrefix: process.env.COMFY_AUDIO_PREFIX || 'audio/AIGen',
     kreaConceptLora: process.env.NUXT_KREA_CONCEPT_LORA || '',
     public: {
       authEnabled: process.env.NUXT_PUBLIC_AUTH_ENABLED === 'true',
diff --git a/pages/index.vue b/pages/index.vue
index c6dd246..2054a8c 100644
--- a/pages/index.vue
+++ b/pages/index.vue
@@ -10,7 +10,7 @@
     <main class="mx-auto grid min-w-0 max-w-7xl gap-6 px-4 py-6 sm:px-6 lg:grid-cols-[minmax(0,1fr)_minmax(0,1fr)] lg:items-stretch">
       <section id="studio-input" class="glass min-w-0 max-w-full space-y-5 rounded-3xl p-5 sm:p-6">
         <div>
-          <div class="mb-4 grid grid-cols-2 gap-3">
+          <div class="mb-4 grid grid-cols-3 gap-3">
             <button
               type="button"
               class="rounded-3xl border px-4 py-4 text-left transition"
@@ -39,6 +39,17 @@
               <span class="mt-3 block font-display text-lg font-bold text-zinc-100">Image</span>
               <span class="mt-0.5 block text-xs text-zinc-500">Flux · Krea</span>
             </button>
+            <NuxtLink
+              to="/music"
+              class="rounded-3xl border border-white/10 px-4 py-4 text-left text-zinc-400 transition hover:border-white/20 hover:text-zinc-200"
+            >
+              <svg class="h-10 w-10" viewBox="0 0 40 40" fill="none" aria-hidden="true">
+                <circle cx="20" cy="20" r="12" stroke="currentColor" stroke-width="2" />
+                <path d="M18 14v12l10-4V12l-10 2Z" stroke="currentColor" stroke-width="2" stroke-linejoin="round" />
+              </svg>
+              <span class="mt-3 block font-display text-lg font-bold text-zinc-100">Music</span>
+              <span class="mt-0.5 block text-xs text-zinc-500">ACE-Step · vocals</span>
+            </NuxtLink>
           </div>
           <h2 class="font-display text-2xl font-bold">Input</h2>
           <p class="text-sm text-zinc-400">{{ studioMode === 'editv2'
diff --git a/pages/library.vue b/pages/library.vue
index e31319e..8c8cc27 100644
--- a/pages/library.vue
+++ b/pages/library.vue
@@ -161,6 +161,18 @@
                 >
                   <div class="relative aspect-[4/5] bg-zinc-900">
                     <span v-if="thumbHidden(entry)" class="sensitive-glow block h-full w-full" />
+                    <div
+                      v-else-if="entry.kind === 'track'"
+                      class="flex h-full w-full items-end gap-0.5 bg-zinc-900 px-4 py-8"
+                      aria-hidden="true"
+                    >
+                      <span
+                        v-for="n in 16"
+                        :key="n"
+                        class="flex-1 rounded-full bg-amber-400/70"
+                        :style="{ height: `${20 + ((n * 17) % 60)}%` }"
+                      />
+                    </div>
                     <img
                       v-else-if="thumbSrc(entry)"
                       :src="thumbSrc(entry)"
@@ -171,7 +183,7 @@
                       class="h-full w-full object-cover"
                     >
                     <span v-else class="block h-full w-full bg-zinc-800" />
-                    <span class="absolute left-2 top-2 rounded-md bg-black/60 px-1.5 py-0.5 text-[10px] uppercase tracking-wide text-zinc-200">{{ entry.kind === 'clip' ? 'Video' : 'Image' }}</span>
+                    <span class="absolute left-2 top-2 rounded-md bg-black/60 px-1.5 py-0.5 text-[10px] uppercase tracking-wide text-zinc-200">{{ entry.kind === 'clip' ? 'Video' : entry.kind === 'track' ? 'Music' : 'Image' }}</span>
                     <span
                       v-if="partCount(entry) > 1"
                       class="absolute right-2 top-2 rounded-md bg-black/60 px-1.5 py-0.5 text-[10px] text-amber-100"
@@ -235,6 +247,9 @@
               controls
               playsinline
             />
+            <div v-else-if="focused.kind === 'track' && previewAudio" class="p-4">
+              <AudioPlayer :src="previewAudio" :download-name="`${focused.name}.${focused.track?.ext || 'flac'}`" />
+            </div>
             <button
               v-else-if="focused.kind === 'still' && previewStillSrc"
               type="button"
@@ -263,6 +278,7 @@
               >
             </button>
             <FamilyNav
+              v-if="focused.kind !== 'track'"
               :count="focusedNavParts.length"
               :index="focusedNavIndex"
               :prev-label="focused?.kind === 'clip' ? 'Previous clip' : 'Previous image'"
@@ -270,7 +286,7 @@
               @step="stepFocusedFamily"
             />
             <button
-              v-if="showPrivacyToggles"
+              v-if="showPrivacyToggles && focused.kind !== 'track'"
               type="button"
               class="absolute right-2 top-2 z-30 flex h-8 w-8 items-center justify-center rounded-full border border-white/20 bg-black/60 text-zinc-100 hover:border-amber-300/50 hover:text-amber-100"
               :title="detailsHidden ? 'Show preview' : 'Hide preview'"
@@ -300,8 +316,8 @@
             </button>
           </div>
           <div class="mt-3 flex flex-wrap gap-2">
-            <button type="button" class="rounded-full border border-amber-300/40 px-3 py-1.5 text-xs text-amber-100" @click="openInStudio(focused)">Open in Studio</button>
-            <button type="button" class="rounded-full border border-white/10 px-3 py-1.5 text-xs text-zinc-300 hover:text-white" @click="useInStudio(focused)">Use as input</button>
+            <button type="button" class="rounded-full border border-amber-300/40 px-3 py-1.5 text-xs text-amber-100" @click="openInStudio(focused)">{{ focused.kind === 'track' ? 'Open in Music' : 'Open in Studio' }}</button>
+            <button v-if="focused.kind !== 'track'" type="button" class="rounded-full border border-white/10 px-3 py-1.5 text-xs text-zinc-300 hover:text-white" @click="useInStudio(focused)">Use as input</button>
             <button
               v-if="focused.kind === 'still' && focusedStillRole !== 'input'"
               type="button"
@@ -323,7 +339,7 @@
               class="rounded-full border border-white/10 px-3 py-1.5 text-xs text-zinc-300 hover:text-white"
             >Download</a>
             <button
-              v-if="!detailsHidden && (previewVideo || previewStillSrc || thumbSrc(focused))"
+              v-if="!detailsHidden && focused.kind !== 'track' && (previewVideo || previewStillSrc || thumbSrc(focused))"
               type="button"
               class="rounded-full border border-white/10 px-3 py-1.5 text-xs text-zinc-300 hover:text-white"
               @click="lightboxOpen = true"
@@ -364,7 +380,7 @@
 
     <Teleport to="body">
       <div
-        v-if="lightboxOpen && focused && !detailsHidden"
+        v-if="lightboxOpen && focused && !detailsHidden && focused.kind !== 'track'"
         class="fixed inset-0 z-[80] flex items-center justify-center bg-black/85 p-3 sm:p-6"
         role="dialog"
         aria-modal="true"
@@ -446,10 +462,11 @@ import {
   type LibraryFilter,
   type LibraryFolder,
   type LibrarySort,
-  type LibraryStill
+  type LibraryStill,
+  type LibraryTrack
 } from '~/utils/libraryBrowse'
 import { isXaigenStudio } from '~/utils/videoModels'
-import { clipSettingsRows, stillSettingsRows } from '~/utils/libraryGeneration'
+import { clipSettingsRows, stillSettingsRows, trackSettingsRows } from '~/utils/libraryGeneration'
 
 const CARD_MIN = 156
 const GAP = 10
@@ -459,7 +476,8 @@ const DRAG_MIME = 'application/x-aigen-library'
 const filterOptions = [
   { id: 'all' as const, label: 'All' },
   { id: 'images' as const, label: 'Images' },
-  { id: 'videos' as const, label: 'Videos' }
+  { id: 'videos' as const, label: 'Videos' },
+  { id: 'music' as const, label: 'Music' }
 ]
 
 const runtimeConfig = useRuntimeConfig()
@@ -473,6 +491,7 @@ const showPrivacyToggles = computed(() => isXaigenStudio({
 const folders = ref<LibraryFolder[]>([])
 const clips = ref<LibraryClip[]>([])
 const stills = ref<LibraryStill[]>([])
+const tracks = ref<LibraryTrack[]>([])
 const folderId = ref('all')
 const filter = ref<LibraryFilter>('all')
 const sort = ref<LibrarySort>('date-desc')
@@ -511,6 +530,7 @@ const browseFolder = computed(() => folders.value.find(folder => folder.id === f
 const entries = computed(() => buildLibraryEntries({
   clips: clips.value,
   stills: stills.value,
+  tracks: tracks.value,
   folderId: folderId.value,
   filter: filter.value,
   search: search.value,
@@ -521,6 +541,7 @@ const allCount = computed(() => {
   return buildLibraryEntries({
     clips: clips.value,
     stills: stills.value,
+    tracks: tracks.value,
     folderId: 'all',
     filter: filter.value,
     search: '',
@@ -528,17 +549,21 @@ const allCount = computed(() => {
   }).length
 })
 const folderChipCounts = computed(() => {
-  const map: Record<string, { videos: number; images: number }> = {}
+  const map: Record<string, { videos: number; images: number; music: number }> = {}
   for (const clip of clips.value) {
     if (clip.hasVideo === false) continue
-    const row = map[clip.folderId] || (map[clip.folderId] = { videos: 0, images: 0 })
+    const row = map[clip.folderId] || (map[clip.folderId] = { videos: 0, images: 0, music: 0 })
     row.videos += 1
   }
   for (const still of stills.value) {
     if (still.role !== 'output') continue
-    const row = map[still.folderId] || (map[still.folderId] = { videos: 0, images: 0 })
+    const row = map[still.folderId] || (map[still.folderId] = { videos: 0, images: 0, music: 0 })
     row.images += 1
   }
+  for (const track of tracks.value) {
+    const row = map[track.folderId] || (map[track.folderId] = { videos: 0, images: 0, music: 0 })
+    row.music += 1
+  }
   return map
 })
 const moveFolders = computed(() => folders.value.filter(folder => folder.id !== folderId.value))
@@ -552,6 +577,7 @@ const emptyLabel = computed(() => {
   if (search.value.trim()) return 'Nothing matches that search.'
   if (filter.value === 'images') return 'No generated stills here yet.'
   if (filter.value === 'videos') return 'No generated clips here yet.'
+  if (filter.value === 'music') return 'No generated tracks here yet.'
   return 'Nothing in this folder yet.'
 })
 const cols = computed(() => Math.max(2, Math.floor((viewportW.value + GAP) / (CARD_MIN + GAP))))
@@ -580,6 +606,10 @@ const previewStillSrc = computed(() => {
   const id = focusedPartId.value || focused.value.stillGroup.head.id
   return `/api/library/stills/${id}`
 })
+const previewAudio = computed(() => {
+  if (focused.value?.kind !== 'track' || !focused.value.track) return ''
+  return `/api/library/tracks/${focused.value.track.id}/audio`
+})
 const focusedParts = computed(() => {
   if (focused.value?.kind === 'clip') return focused.value.group?.parts || []
   return focused.value?.stillGroup?.parts || []
@@ -606,6 +636,9 @@ const focusedSettingsRows = computed(() => {
     const item = focused.value.group.parts.find(part => part.id === focusedPartId.value) || focused.value.group.head
     return clipSettingsRows(item)
   }
+  if (focused.value?.kind === 'track' && focused.value.track) {
+    return trackSettingsRows(focused.value.track)
+  }
   const still = focused.value?.stillGroup?.parts.find(part => part.id === focusedPartId.value) || focused.value?.stillGroup?.head
   return still ? stillSettingsRows(still) : []
 })
@@ -616,6 +649,9 @@ const detailMeta = computed(() => {
     const item = entry.group.parts.find(part => part.id === focusedPartId.value) || entry.group.head
     return [item.width && item.height ? `${item.width}×${item.height}` : '', formatClipDuration(item.duration), formatWhen(item.createdAt)].filter(Boolean).join(' · ')
   }
+  if (entry.kind === 'track' && entry.track) {
+    return [formatClipDuration(entry.track.duration), entry.track.ext?.toUpperCase(), formatWhen(entry.track.createdAt)].filter(Boolean).join(' · ')
+  }
   const still = entry.stillGroup?.parts.find(part => part.id === focusedPartId.value) || entry.stillGroup?.head
   if (!still) return ''
   return [still.width && still.height ? `${still.width}×${still.height}` : 'image', formatWhen(still.createdAt)].filter(Boolean).join(' · ')
@@ -625,6 +661,9 @@ const downloadHref = computed(() => {
     const id = focusedPartId.value || focused.value.group.head.id
     return `/api/library/clips/${id}/video`
   }
+  if (focused.value?.kind === 'track' && focused.value.track) {
+    return `/api/library/tracks/${focused.value.track.id}/audio`
+  }
   if (focused.value?.stillGroup) {
     const id = focusedPartId.value || focused.value.stillGroup.head.id
     return `/api/library/stills/${id}`
@@ -648,8 +687,9 @@ function applyLibrary(data: unknown) {
     folders?: LibraryFolder[]
     clips?: LibraryClip[]
     stills?: LibraryStill[]
+    tracks?: LibraryTrack[]
   }
-  if (payload.id && !payload.folders && !payload.clips && !payload.stills) {
+  if (payload.id && !payload.folders && !payload.clips && !payload.stills && !payload.tracks) {
     if (typeof payload.hideInput === 'boolean') {
       const still = stills.value.find(item => item.id === payload.id)
       if (still) still.hideInput = payload.hideInput
@@ -663,6 +703,7 @@ function applyLibrary(data: unknown) {
   folders.value = payload.folders || []
   clips.value = payload.clips || []
   stills.value = payload.stills || []
+  tracks.value = payload.tracks || []
   if (folderId.value !== 'all' && !folders.value.some(folder => folder.id === folderId.value)) {
     folderId.value = folders.value[0]?.id || 'all'
   }
@@ -673,12 +714,13 @@ async function loadLibrary() {
 }
 
 function folderChipCount(folder: LibraryFolder) {
-  if (!folder.unlocked) return (folder.clipCount || 0) + (folder.imageCount || 0)
+  if (!folder.unlocked) return (folder.clipCount || 0) + (folder.imageCount || 0) + (folder.trackCount || 0)
   const row = folderChipCounts.value[folder.id]
   if (!row) return 0
   if (filter.value === 'videos') return row.videos
   if (filter.value === 'images') return row.images
-  return row.videos + row.images
+  if (filter.value === 'music') return row.music
+  return row.videos + row.images + row.music
 }
 
 function folderChipClass(id: string) {
@@ -696,6 +738,7 @@ function cardClass(entry: LibraryEntry) {
 
 function itemHidden(entry: LibraryEntry) {
   if (entry.kind === 'clip') return Boolean(entry.group?.head.hideThumbnail)
+  if (entry.kind === 'track') return false
   return Boolean(entry.stillGroup?.head.hideInput)
 }
 
@@ -751,11 +794,13 @@ async function toggleFocusedHidden() {
 
 function thumbSrc(entry: LibraryEntry) {
   if (entry.kind === 'clip' && entry.group) return `/api/library/clips/${entry.group.head.id}/thumb`
+  if (entry.kind === 'track') return ''
   if (entry.stillGroup) return `/api/library/stills/${entry.stillGroup.head.id}?thumb=1`
   return ''
 }
 
 function partCount(entry: LibraryEntry) {
+  if (entry.kind === 'track') return 1
   return entry.kind === 'clip' ? (entry.group?.parts.length || 1) : (entry.stillGroup?.parts.length || 1)
 }
 
@@ -764,6 +809,9 @@ function cardMeta(entry: LibraryEntry) {
     const branches = familyBranchHint(entry.group.parts)
     return [formatClipDuration(entry.group.head.duration), formatWhen(entry.createdAt), branches].filter(Boolean).join(' · ')
   }
+  if (entry.kind === 'track' && entry.track) {
+    return [formatClipDuration(entry.track.duration), formatWhen(entry.createdAt)].filter(Boolean).join(' · ')
+  }
   return formatWhen(entry.createdAt)
 }
 
@@ -847,7 +895,11 @@ function onCardClick(entry: LibraryEntry, event: MouseEvent) {
   }
   const sameCard = focusedKey.value === entry.key
   focusedKey.value = entry.key
-  focusedPartId.value = entry.kind === 'clip' ? (entry.group?.head.id || '') : (entry.stillGroup?.head.id || '')
+  focusedPartId.value = entry.kind === 'clip'
+    ? (entry.group?.head.id || '')
+    : entry.kind === 'track'
+      ? (entry.track?.id || '')
+      : (entry.stillGroup?.head.id || '')
   if (!sameCard) detailsHidden.value = itemHidden(entry) && !revealAll.value
   cancelRename()
 }
@@ -886,7 +938,11 @@ function selectedEntries(keys = selectedKeys.value) {
 
 async function moveKeys(keys: string[], destId: string) {
   const items = selectedEntries(keys).filter((entry) => {
-    const current = entry.kind === 'clip' ? entry.group?.head.folderId : entry.stillGroup?.head.folderId
+    const current = entry.kind === 'clip'
+      ? entry.group?.head.folderId
+      : entry.kind === 'track'
+        ? entry.track?.folderId
+        : entry.stillGroup?.head.folderId
     return current && current !== destId
   })
   if (!items.length) return
@@ -895,6 +951,9 @@ async function moveKeys(keys: string[], destId: string) {
     if (entry.kind === 'clip') {
       return $fetch(`/api/library/clips/${entry.group!.head.id}`, { method: 'PATCH', body: { folderId: destId, family: true } })
     }
+    if (entry.kind === 'track') {
+      return $fetch(`/api/library/tracks/${entry.track!.id}`, { method: 'PATCH', body: { folderId: destId } })
+    }
     return $fetch(`/api/library/stills/${entry.stillGroup!.head.id}`, { method: 'PATCH', body: { folderId: destId, family: true } })
   }))
   await loadLibrary()
@@ -923,6 +982,10 @@ function openInStudio(entry: LibraryEntry) {
     navigateTo({ path: '/', query: { clip: focusedPartId.value || entry.group.head.id } })
     return
   }
+  if (entry.kind === 'track' && entry.track) {
+    navigateTo({ path: '/music', query: { track: entry.track.id } })
+    return
+  }
   if (entry.stillGroup) {
     navigateTo({ path: '/', query: { still: focusedPartId.value || entry.stillGroup.head.id } })
   }
@@ -996,6 +1059,8 @@ async function saveRename() {
   try {
     if (entry.kind === 'clip' && entry.group) {
       applyLibrary(await $fetch(`/api/library/clips/${entry.group.head.id}`, { method: 'PATCH', body: { name, family: true } }))
+    } else if (entry.kind === 'track' && entry.track) {
+      applyLibrary(await $fetch(`/api/library/tracks/${entry.track.id}`, { method: 'PATCH', body: { name } }))
     } else if (entry.stillGroup) {
       applyLibrary(await $fetch(`/api/library/stills/${entry.stillGroup.head.id}`, { method: 'PATCH', body: { name, family: true } }))
     }
@@ -1038,6 +1103,9 @@ async function confirmDelete() {
       if (entry.kind === 'clip') {
         return $fetch(`/api/library/clips/${entry.group!.head.id}`, { method: 'DELETE', query: { family: '1' } })
       }
+      if (entry.kind === 'track') {
+        return $fetch(`/api/library/tracks/${entry.track!.id}`, { method: 'DELETE' })
+      }
       return $fetch(`/api/library/stills/${entry.stillGroup!.head.id}`, { method: 'DELETE', query: { family: '1' } })
     }))
     if (pending.keys.includes(focusedKey.value)) {
diff --git a/pages/music.vue b/pages/music.vue
new file mode 100644
index 0000000..c6d578e
--- /dev/null
+++ b/pages/music.vue
@@ -0,0 +1,344 @@
+<template>
+  <div class="min-h-dvh min-w-0">
+    <AppHeader
+      subtitle="ACE-Step · vocals"
+      current="music"
+    />
+
+    <main class="mx-auto grid min-w-0 max-w-7xl gap-6 px-4 py-6 sm:px-6 lg:grid-cols-[minmax(0,1fr)_minmax(0,1fr)] lg:items-stretch">
+      <section class="glass min-w-0 max-w-full space-y-5 rounded-3xl p-5 sm:p-6">
+        <div>
+          <h2 class="font-display text-2xl font-bold">Music Generator</h2>
+          <p class="mt-1 text-sm text-zinc-400">
+            Tags describe style and voice. Lyrics use structure chips. Instrumental skips the vocal line.
+          </p>
+        </div>
+
+        <p v-if="error" class="rounded-2xl border border-red-400/30 bg-red-400/10 px-4 py-3 text-sm text-red-200">{{ error }}</p>
+
+        <label class="block text-sm">
+          <span class="mb-1 block font-medium text-zinc-300">Genre &amp; style tags</span>
+          <input
+            v-model="tags"
+            class="w-full rounded-xl border border-white/10 bg-zinc-950 px-3 py-2 text-sm outline-none ring-amber-300/40 placeholder:text-zinc-600 focus:ring-2"
+            :placeholder="tagsPlaceholder"
+            maxlength="2000"
+          >
+        </label>
+
+        <div>
+          <div class="mb-1 flex flex-wrap items-center justify-between gap-2">
+            <span class="text-sm font-medium text-zinc-300">Lyrics</span>
+            <label class="flex cursor-pointer items-center gap-2 text-xs text-zinc-400">
+              <input v-model="instrumental" type="checkbox" class="accent-amber-400">
+              Instrumental
+            </label>
+          </div>
+          <div class="mb-2 flex flex-wrap gap-1.5">
+            <button
+              v-for="chip in chips"
+              :key="chip"
+              type="button"
+              class="rounded-full border border-white/10 px-2.5 py-1 text-[11px] text-zinc-300 hover:border-amber-300/50 hover:text-white disabled:opacity-40"
+              :disabled="instrumental"
+              @click="insertChip(chip)"
+            >{{ chip }}</button>
+          </div>
+          <textarea
+            ref="lyricsEl"
+            v-model="lyrics"
+            rows="12"
+            class="max-h-[min(28rem,50vh)] w-full overflow-y-auto rounded-2xl border border-white/10 bg-zinc-950/70 px-4 py-3 text-sm outline-none ring-amber-300/40 placeholder:text-zinc-600 [overflow-wrap:anywhere] focus:ring-2 disabled:opacity-50"
+            :disabled="instrumental"
+            :placeholder="lyricsPlaceholder"
+          />
+        </div>
+
+        <div class="grid gap-4 sm:grid-cols-2">
+          <label class="block text-sm">
+            <span class="mb-1 block font-medium text-zinc-300">Duration · {{ duration }}s</span>
+            <input
+              v-model.number="duration"
+              type="range"
+              class="aigen-slider w-full"
+              :min="durationMin"
+              :max="durationMax"
+              step="5"
+            >
+            <span class="mt-1 block text-[11px] text-zinc-500">{{ durationMin }}–{{ durationMax }} seconds</span>
+          </label>
+          <label class="block text-sm">
+            <span class="mb-1 block font-medium text-zinc-300">Steps · {{ steps }}</span>
+            <input
+              v-model.number="steps"
+              type="range"
+              class="aigen-slider w-full"
+              :min="stepsMin"
+              :max="stepsMax"
+              step="1"
+            >
+            <span class="mt-1 block text-[11px] text-zinc-500">30–50 is the usual range</span>
+          </label>
+        </div>
+
+        <div class="grid gap-3 sm:grid-cols-2">
+          <label class="block text-sm">
+            <span class="mb-1 block font-medium text-zinc-300">Seed</span>
+            <input
+              v-model="seed"
+              class="w-full rounded-xl border border-white/10 bg-zinc-950 px-3 py-2 text-sm outline-none ring-amber-300/40 placeholder:text-zinc-600 focus:ring-2"
+              placeholder="random"
+            >
+          </label>
+          <label class="block text-sm">
+            <span class="mb-1 block font-medium text-zinc-300">Folder</span>
+            <select v-model="folderId" class="w-full rounded-xl border border-white/10 bg-zinc-950 px-3 py-2 text-sm">
+              <option v-for="folder in folders" :key="folder.id" :value="folder.id">{{ folder.name }}</option>
+            </select>
+          </label>
+        </div>
+
+        <label class="block text-sm">
+          <span class="mb-1 block font-medium text-zinc-300">Name</span>
+          <input
+            v-model="name"
+            class="w-full rounded-xl border border-white/10 bg-zinc-950 px-3 py-2 text-sm outline-none ring-amber-300/40 placeholder:text-zinc-600 focus:ring-2"
+            maxlength="80"
+            placeholder="Optional track name"
+          >
+        </label>
+
+        <button
+          type="button"
+          class="inline-flex w-full items-center justify-center gap-2 rounded-2xl bg-amber-400 px-4 py-3 text-sm font-semibold text-zinc-950 hover:bg-amber-300 disabled:cursor-not-allowed disabled:opacity-50"
+          :disabled="busy || blocked"
+          @click="generate"
+        >
+          <span
+            v-if="busy"
+            class="h-4 w-4 animate-spin rounded-full border-2 border-zinc-950/20 border-t-zinc-950"
+          />
+          {{ busy ? (status || 'Generating…') : 'Generate' }}
+        </button>
+        <p v-if="blockReason" class="text-xs text-zinc-400">{{ blockReason }}</p>
+      </section>
+
+      <section class="glass min-w-0 max-w-full space-y-4 rounded-3xl p-5 sm:p-6">
+        <div>
+          <h2 class="font-display text-2xl font-bold">Output</h2>
+          <p class="mt-1 text-sm text-zinc-400">{{ status || 'Waiting for a generate.' }}</p>
+        </div>
+        <div v-if="busy" class="h-2 overflow-hidden rounded-full bg-zinc-800">
+          <div class="progress-glow h-full rounded-full bg-amber-400 transition-[width]" :style="{ width: `${Math.max(progress, 4)}%` }" />
+        </div>
+        <AudioPlayer
+          v-if="audioUrl"
+          :src="audioUrl"
+          :download-name="downloadName"
+        />
+        <div v-else class="flex min-h-44 items-center justify-center rounded-2xl border border-dashed border-white/10 text-sm text-zinc-500">
+          Generated FLAC / WAV plays here
+        </div>
+        <p v-if="trackId" class="text-xs text-zinc-500">
+          Saved to library.
+          <NuxtLink to="/library" class="text-amber-200 hover:text-amber-100">Open Library</NuxtLink>
+        </p>
+      </section>
+    </main>
+  </div>
+</template>
+
+<script setup lang="ts">
+import {
+  DEFAULT_MUSIC_LYRICS,
+  DEFAULT_MUSIC_TAGS,
+  MUSIC_DURATION_DEFAULT,
+  MUSIC_DURATION_MAX,
+  MUSIC_DURATION_MIN,
+  MUSIC_STEPS_DEFAULT,
+  MUSIC_STEPS_MAX,
+  MUSIC_STEPS_MIN,
+  MUSIC_STRUCTURE_CHIPS
+} from '~/utils/music'
+import { ensureGenerationNotifyPermission, notifyGenerationComplete } from '~/utils/generationNotify'
+import type { LibraryFolder } from '~/utils/libraryBrowse'
+
+const tagsPlaceholder = DEFAULT_MUSIC_TAGS
+const lyricsPlaceholder = DEFAULT_MUSIC_LYRICS
+const chips = MUSIC_STRUCTURE_CHIPS
+const durationMin = MUSIC_DURATION_MIN
+const durationMax = MUSIC_DURATION_MAX
+const stepsMin = MUSIC_STEPS_MIN
+const stepsMax = MUSIC_STEPS_MAX
+
+const tags = ref(DEFAULT_MUSIC_TAGS)
+const lyrics = ref(DEFAULT_MUSIC_LYRICS)
+const instrumental = ref(false)
+const duration = ref(MUSIC_DURATION_DEFAULT)
+const steps = ref(MUSIC_STEPS_DEFAULT)
+const seed = ref('')
+const name = ref('')
+const folderId = ref('')
+const folders = ref<LibraryFolder[]>([])
+const lyricsEl = ref<HTMLTextAreaElement | null>(null)
+const busy = ref(false)
+const error = ref('')
+const status = ref('')
+const progress = ref(0)
+const audioUrl = ref('')
+const trackId = ref('')
+const jobId = ref('')
+const downloadName = ref('track.flac')
+let source: EventSource | null = null
+let listenGen = 0
+let settled = false
+
+const blocked = computed(() => !tags.value.trim() || (!instrumental.value && !lyrics.value.trim()) || !folderId.value)
+const blockReason = computed(() => {
+  if (!folderId.value) return 'Choose a library folder before generating.'
+  if (!tags.value.trim()) return 'Add genre and style tags.'
+  if (!instrumental.value && !lyrics.value.trim()) return 'Write lyrics, or turn on Instrumental.'
+  return ''
+})
+
+function insertChip(chip: string) {
+  const el = lyricsEl.value
+  const token = `${chip}\n`
+  if (!el) {
+    lyrics.value = `${lyrics.value}${lyrics.value.endsWith('\n') || !lyrics.value ? '' : '\n'}${token}`
+    return
+  }
+  const start = el.selectionStart ?? lyrics.value.length
+  const end = el.selectionEnd ?? start
+  lyrics.value = `${lyrics.value.slice(0, start)}${token}${lyrics.value.slice(end)}`
+  nextTick(() => {
+    const pos = start + token.length
+    el.focus()
+    el.setSelectionRange(pos, pos)
+  })
+}
+
+async function loadLibrary() {
+  const payload = await $fetch<{ folders?: LibraryFolder[] }>('/api/library?light=1').catch(() => ({ folders: [] }))
+  folders.value = payload.folders || []
+  if (!folderId.value || !folders.value.some(folder => folder.id === folderId.value)) {
+    folderId.value = folders.value.find(folder => folder.unlocked)?.id || folders.value[0]?.id || ''
+  }
+}
+
+function stopListen() {
+  listenGen += 1
+  source?.close()
+  source = null
+}
+
+function applyEvent(payload: Record<string, any>) {
+  if (payload.message) status.value = payload.message
+  if (typeof payload.progress === 'number') progress.value = payload.progress
+  if (payload.type === 'complete' || payload.status === 'complete') {
+    settled = true
+    busy.value = false
+    status.value = payload.message || 'Track ready'
+    progress.value = 100
+    if (payload.trackId) {
+      trackId.value = payload.trackId
+      audioUrl.value = `/api/library/tracks/${payload.trackId}/audio`
+      downloadName.value = `${(name.value || 'track').replace(/[^\w.-]+/g, '-')}.flac`
+    } else if (payload.filename) {
+      const params = new URLSearchParams({
+        filename: payload.filename,
+        subfolder: payload.subfolder || 'audio',
+        type: payload.mediaType || 'output'
+      })
+      audioUrl.value = `/api/media?${params.toString()}`
+    }
+    stopListen()
+    void notifyGenerationComplete('music')
+  }
+  if (payload.type === 'error' || payload.status === 'error') {
+    settled = true
+    busy.value = false
+    error.value = payload.error || payload.message || 'Generation failed'
+    status.value = error.value
+    stopListen()
+  }
+}
+
+function listen(id: string) {
+  stopListen()
+  const gen = listenGen
+  settled = false
+  const stream = new EventSource(`/api/generate/${id}/stream`)
+  source = stream
+  stream.onmessage = (event) => {
+    if (gen !== listenGen) return
+    applyEvent(JSON.parse(event.data))
+  }
+  stream.onerror = () => {
+    if (gen !== listenGen) return
+    stream.close()
+    setTimeout(() => {
+      if (gen !== listenGen || settled) return
+      listen(id)
+    }, 2000)
+  }
+}
+
+async function generate() {
+  if (blocked.value) {
+    error.value = blockReason.value
+    return
+  }
+  error.value = ''
+  await ensureGenerationNotifyPermission()
+  busy.value = true
+  settled = false
+  progress.value = 2
+  audioUrl.value = ''
+  trackId.value = ''
+  status.value = 'Queueing ACE-Step…'
+  try {
+    const started = await $fetch<{ jobId: string; name?: string }>(
+      '/api/generate/music',
+      {
+        method: 'POST',
+        body: {
+          tags: tags.value,
+          lyrics: lyrics.value,
+          duration: duration.value,
+          steps: steps.value,
+          seed: seed.value || 'random',
+          instrumental: instrumental.value,
+          folderId: folderId.value,
+          name: name.value.trim()
+        }
+      }
+    )
+    jobId.value = started.jobId
+    if (started.name) downloadName.value = `${started.name}.flac`
+    listen(started.jobId)
+  } catch (err: any) {
+    busy.value = false
+    error.value = err?.data?.statusMessage || err?.statusMessage || err?.message || 'Could not queue music generation'
+    status.value = error.value
+  }
+}
+
+watch(instrumental, (on) => {
+  if (on && !lyrics.value.trim()) lyrics.value = DEFAULT_MUSIC_LYRICS
+})
+
+onMounted(async () => {
+  await loadLibrary()
+  const query = useRoute().query
+  if (typeof query.track === 'string' && query.track) {
+    audioUrl.value = `/api/library/tracks/${query.track}/audio`
+    trackId.value = query.track
+    status.value = 'Loaded from library'
+  }
+})
+
+onBeforeUnmount(() => {
+  stopListen()
+})
+</script>
diff --git a/scripts/download_music_models.ps1 b/scripts/download_music_models.ps1
new file mode 100644
index 0000000..a88a1e0
--- /dev/null
+++ b/scripts/download_music_models.ps1
@@ -0,0 +1,322 @@
+# Download ACE-Step / YuE weights into the local ComfyUI models tree via Hugging Face CLI.
+# Example:
+#   powershell -ExecutionPolicy Bypass -File scripts\download_music_models.ps1
+#   powershell -File scripts\download_music_models.ps1 -ComfyRoot C:\ComfyUI -SkipYue
+
+[CmdletBinding()]
+param(
+  [string]$ComfyRoot = '',
+  [switch]$SkipAceStep,
+  [switch]$SkipAceStep15,
+  [switch]$SkipYue,
+  [switch]$Force
+)
+
+$ErrorActionPreference = 'Stop'
+$ProgressPreference = 'Continue'
+
+function Write-Step([string]$Message) {
+  Write-Host ""
+  Write-Host "==> $Message" -ForegroundColor Cyan
+}
+
+function Write-Ok([string]$Message) {
+  Write-Host "    $Message" -ForegroundColor Green
+}
+
+function Write-Skip([string]$Message) {
+  Write-Host "    skip  $Message" -ForegroundColor DarkYellow
+}
+
+function Write-Warn([string]$Message) {
+  Write-Host "    warn  $Message" -ForegroundColor Yellow
+}
+
+function Resolve-ComfyRoot([string]$Hint) {
+  $candidates = @(
+    $Hint,
+    $env:COMFY_ROOT,
+    $env:COMFYUI_ROOT,
+    'C:\ComfyUI',
+    'C:\ComfyUI_windows_portable\ComfyUI',
+    'D:\ComfyUI',
+    'C:\ComfyUI-MiniMax\ComfyUI',
+    (Join-Path $env:USERPROFILE 'ComfyUI'),
+    (Join-Path $env:LOCALAPPDATA 'Comfy-Desktop\ComfyUI-Installs\ComfyUI (1)\ComfyUI'),
+    (Join-Path $env:LOCALAPPDATA 'Comfy-Desktop\ComfyUI-Installs\ComfyUI\ComfyUI')
+  ) | Where-Object { $_ } | ForEach-Object { $_.TrimEnd('\', '/') }
+
+  foreach ($path in $candidates) {
+    if (Test-Path (Join-Path $path 'main.py')) { return (Resolve-Path $path).Path }
+    if (Test-Path (Join-Path $path 'ComfyUI\main.py')) { return (Resolve-Path (Join-Path $path 'ComfyUI')).Path }
+  }
+
+  Write-Host "Could not find ComfyUI (looked for main.py)." -ForegroundColor Red
+  $typed = Read-Host "Enter ComfyUI root path (or blank to abort)"
+  if (-not $typed) { throw "COMFY_ROOT is required." }
+  $typed = $typed.Trim().Trim('"')
+  if (-not (Test-Path (Join-Path $typed 'main.py'))) {
+    throw "Not a ComfyUI root (missing main.py): $typed"
+  }
+  return (Resolve-Path $typed).Path
+}
+
+function Get-DirBytes([string]$Path) {
+  if (-not (Test-Path $Path)) { return [long]0 }
+  $item = Get-Item $Path
+  if (-not $item.PSIsContainer) { return [long]$item.Length }
+  [long]((Get-ChildItem $Path -Recurse -File -ErrorAction SilentlyContinue | Measure-Object Length -Sum).Sum)
+}
+
+function Format-Bytes([long]$Bytes) {
+  if ($Bytes -ge 1GB) { return ('{0:N2} GB' -f ($Bytes / 1GB)) }
+  if ($Bytes -ge 1MB) { return ('{0:N1} MB' -f ($Bytes / 1MB)) }
+  if ($Bytes -ge 1KB) { return ('{0:N0} KB' -f ($Bytes / 1KB)) }
+  return "$Bytes B"
+}
+
+function Test-VerifiedTarget([string]$Path, [long]$MinBytes = 1MB) {
+  if (-not (Test-Path $Path)) { return $false }
+  $item = Get-Item $Path
+  if (-not $item.PSIsContainer) { return $item.Length -ge $MinBytes }
+  $files = Get-ChildItem $Path -Recurse -File -ErrorAction SilentlyContinue
+  if (-not $files) { return $false }
+  $total = [long]($files | Measure-Object Length -Sum).Sum
+  return $total -ge $MinBytes
+}
+
+function Ensure-Dir([string]$Path) {
+  if (-not (Test-Path $Path)) {
+    New-Item -ItemType Directory -Force -Path $Path | Out-Null
+  }
+}
+
+function Find-HfCli {
+  foreach ($name in @('hf', 'huggingface-cli')) {
+    $cmd = Get-Command $name -ErrorAction SilentlyContinue
+    if ($cmd) { return $cmd.Source }
+  }
+  return $null
+}
+
+function Ensure-HfCli {
+  $cli = Find-HfCli
+  if ($cli) {
+    Write-Ok "Hugging Face CLI: $cli"
+    return $cli
+  }
+
+  Write-Warn "Hugging Face CLI not found (hf / huggingface-cli)."
+  $answer = Read-Host "Install huggingface_hub now (Y/n)"
+  if ($answer -and $answer -notmatch '^(y|yes)$') {
+    throw "Hugging Face CLI is required. Install with: pip install -U huggingface_hub"
+  }
+
+  $pip = Get-Command pip -ErrorAction SilentlyContinue
+  $py = Get-Command python -ErrorAction SilentlyContinue
+  if ($pip) {
+    Write-Step "Installing huggingface_hub via pip"
+    & $pip.Source install -U huggingface_hub
+  } elseif ($py) {
+    Write-Step "Installing huggingface_hub via python -m pip"
+    & $py.Source -m pip install -U huggingface_hub
+  } else {
+    throw "pip/python not on PATH. Install Python, then: pip install -U huggingface_hub"
+  }
+
+  $cli = Find-HfCli
+  if (-not $cli) { throw "huggingface_hub installed but hf / huggingface-cli still not on PATH. Open a new terminal and retry." }
+  Write-Ok "Hugging Face CLI: $cli"
+  return $cli
+}
+
+function Invoke-HfDownload {
+  param(
+    [Parameter(Mandatory)] [string]$Cli,
+    [Parameter(Mandatory)] [string]$Repo,
+    [Parameter(Mandatory)] [string]$LocalDir,
+    [string[]]$Include,
+    [string]$File
+  )
+
+  Ensure-Dir $LocalDir
+  $exe = Split-Path $Cli -Leaf
+  $args = @()
+  if ($exe -eq 'huggingface-cli.exe' -or $exe -eq 'huggingface-cli') {
+    $args += @('download', $Repo)
+  } else {
+    $args += @('download', $Repo)
+  }
+  if ($File) { $args += $File }
+  $args += @('--local-dir', $LocalDir)
+  foreach ($pattern in $Include) {
+    $args += @('--include', $pattern)
+  }
+
+  Write-Host "    hf $($args -join ' ')" -ForegroundColor DarkGray
+  & $Cli @args
+  if ($LASTEXITCODE -ne 0) {
+    throw "hf download failed for $Repo (exit $LASTEXITCODE)"
+  }
+}
+
+function Place-File([string]$Source, [string]$Dest) {
+  Ensure-Dir (Split-Path $Dest -Parent)
+  if ((Test-Path $Source) -and ((Resolve-Path $Source).Path -ne (Join-Path (Split-Path $Dest -Parent) (Split-Path $Dest -Leaf)))) {
+    Copy-Item -Force $Source $Dest
+  }
+}
+
+$root = Resolve-ComfyRoot $ComfyRoot
+$cli = Ensure-HfCli
+
+$checkpoints = Join-Path $root 'models\checkpoints'
+$diffusion = Join-Path $root 'models\diffusion_models'
+$textEncoders = Join-Path $root 'models\text_encoders'
+$vae = Join-Path $root 'models\vae'
+$ttsAce = Join-Path $root 'models\TTS\ACE-Step-v1-3.5B'
+$customAce = Join-Path $root 'custom_nodes\ComfyUI-ACE-Step\models'
+$yueRoot = Join-Path $root 'models\YuE'
+$yueCustom = Join-Path $root 'custom_nodes\ComfyUI-YuE\models'
+
+Write-Step "ComfyUI root"
+Write-Host "    $root"
+Write-Host "    checkpoints     $checkpoints"
+Write-Host "    ACE-Step TTS    $ttsAce"
+Write-Host "    ACE-Step custom $customAce"
+Write-Host "    YuE             $yueRoot"
+
+$before = Get-DirBytes (Join-Path $root 'models')
+$downloaded = [System.Collections.Generic.List[string]]::new()
+$skipped = [System.Collections.Generic.List[string]]::new()
+
+function Pull-IfMissing {
+  param(
+    [string]$Label,
+    [string]$Target,
+    [long]$MinBytes,
+    [scriptblock]$Download
+  )
+  if (-not $Force -and (Test-VerifiedTarget $Target $MinBytes)) {
+    Write-Skip "$Label already present ($((Format-Bytes (Get-DirBytes $Target)))) — $Target"
+    $skipped.Add($Label) | Out-Null
+    return
+  }
+  Write-Step $Label
+  & $Download
+  if (-not (Test-VerifiedTarget $Target $MinBytes)) {
+    throw "Download finished but $Target is missing or too small."
+  }
+  Write-Ok "$Label ready ($((Format-Bytes (Get-DirBytes $Target))))"
+  $downloaded.Add($Label) | Out-Null
+}
+
+if (-not $SkipAceStep) {
+  $aio = Join-Path $checkpoints 'ace_step_v1_3.5b.safetensors'
+  Pull-IfMissing -Label 'ACE-Step v1 3.5B (native AIO checkpoint)' -Target $aio -MinBytes 1GB -Download {
+    Ensure-Dir $checkpoints
+    $tmp = Join-Path $env:TEMP 'aigen-ace-step-aio'
+    Ensure-Dir $tmp
+    Invoke-HfDownload -Cli $cli -Repo 'Comfy-Org/ACE-Step_ComfyUI_repackaged' -LocalDir $tmp -File 'all_in_one/ace_step_v1_3.5b.safetensors'
+    $found = Get-ChildItem $tmp -Recurse -Filter 'ace_step_v1_3.5b.safetensors' | Select-Object -First 1
+    if (-not $found) { throw 'AIO checkpoint not in Hugging Face download.' }
+    Place-File $found.FullName $aio
+  }
+
+  Pull-IfMissing -Label 'ACE-Step v1 3.5B (split transformer / vocoder / UMT5)' -Target $ttsAce -MinBytes 2GB -Download {
+    Invoke-HfDownload -Cli $cli -Repo 'ACE-Step/ACE-Step-v1-3.5B' -LocalDir $ttsAce -Include @('*.safetensors', '*.json')
+  }
+
+  if (Test-Path (Split-Path $customAce -Parent)) {
+    Pull-IfMissing -Label 'ACE-Step custom-node models copy' -Target $customAce -MinBytes 2GB -Download {
+      Ensure-Dir $customAce
+      Copy-Item -Recurse -Force (Join-Path $ttsAce '*') $customAce
+    }
+  } else {
+    Write-Skip "ComfyUI-ACE-Step custom node not installed — split weights stay in models\TTS"
+  }
+}
+
+if (-not $SkipAceStep15) {
+  $aio15 = Join-Path $checkpoints 'ace_step_1.5_turbo_aio.safetensors'
+  Pull-IfMissing -Label 'ACE-Step 1.5 Turbo AIO checkpoint' -Target $aio15 -MinBytes 500MB -Download {
+    Ensure-Dir $checkpoints
+    $tmp = Join-Path $env:TEMP 'aigen-ace-step-15-aio'
+    Ensure-Dir $tmp
+    Invoke-HfDownload -Cli $cli -Repo 'Comfy-Org/ace_step_1.5_ComfyUI_files' -LocalDir $tmp -Include @('*aio*.safetensors', '*turbo_aio*')
+    $found = Get-ChildItem $tmp -Recurse -Filter '*.safetensors' | Where-Object { $_.Name -match 'aio' } | Select-Object -First 1
+    if (-not $found) {
+      Invoke-HfDownload -Cli $cli -Repo 'Comfy-Org/ace_step_1.5_ComfyUI_files' -LocalDir $tmp
+      $found = Get-ChildItem $tmp -Recurse -Filter '*.safetensors' | Where-Object { $_.Name -match 'aio|1\.5' } | Sort-Object Length -Descending | Select-Object -First 1
+    }
+    if (-not $found) { throw 'ACE-Step 1.5 AIO safetensors not found in repo. Download split files instead, or update the repo layout.' }
+    Place-File $found.FullName $aio15
+  }
+
+  $diff15 = Join-Path $diffusion 'acestep_v1.5_turbo.safetensors'
+  $enc06 = Join-Path $textEncoders 'qwen_0.6b_ace15.safetensors'
+  $enc17 = Join-Path $textEncoders 'qwen_1.7b_ace15.safetensors'
+  $vae15 = Join-Path $vae 'ace_1.5_vae.safetensors'
+  $splitOk = (Test-VerifiedTarget $diff15 200MB) -and (Test-VerifiedTarget $enc06 50MB) -and (Test-VerifiedTarget $vae15 20MB)
+  if ($Force -or -not $splitOk) {
+    Write-Step 'ACE-Step 1.5 split files (diffusion / text encoder / VAE)'
+    Ensure-Dir $diffusion
+    Ensure-Dir $textEncoders
+    Ensure-Dir $vae
+    $tmp = Join-Path $env:TEMP 'aigen-ace-step-15-split'
+    Ensure-Dir $tmp
+    Invoke-HfDownload -Cli $cli -Repo 'Comfy-Org/ace_step_1.5_ComfyUI_files' -LocalDir $tmp -Include @('*.safetensors', '*.json')
+    foreach ($pair in @(
+      @{ Match = 'acestep_v1.5_turbo'; Dest = $diff15 },
+      @{ Match = 'qwen_0.6b_ace15'; Dest = $enc06 },
+      @{ Match = 'qwen_1.7b_ace15'; Dest = $enc17 },
+      @{ Match = 'ace_1.5_vae'; Dest = $vae15 }
+    )) {
+      $hit = Get-ChildItem $tmp -Recurse -Filter '*.safetensors' | Where-Object { $_.Name -like "*$($pair.Match)*" } | Select-Object -First 1
+      if ($hit) { Place-File $hit.FullName $pair.Dest; Write-Ok $hit.Name }
+      else { Write-Warn "Did not find $($pair.Match)*.safetensors in the 1.5 repo" }
+    }
+    $downloaded.Add('ACE-Step 1.5 split files') | Out-Null
+  } else {
+    Write-Skip "ACE-Step 1.5 split files already present"
+    $skipped.Add('ACE-Step 1.5 split files') | Out-Null
+  }
+}
+
+if (-not $SkipYue) {
+  $s1 = Join-Path $yueRoot 'YuE-s1-7B-anneal-en-cot'
+  $s2 = Join-Path $yueRoot 'YuE-s2-1B-general'
+  $codec = Join-Path $yueRoot 'xcodec_mini_infer'
+
+  Pull-IfMissing -Label 'YuE stage-1 (s1 7B anneal EN CoT)' -Target $s1 -MinBytes 1GB -Download {
+    Invoke-HfDownload -Cli $cli -Repo 'm-a-p/YuE-s1-7B-anneal-en-cot' -LocalDir $s1 -Include @('*.safetensors', '*.bin', '*.json', '*.model', '*.txt')
+  }
+  Pull-IfMissing -Label 'YuE stage-2 (s2 1B general)' -Target $s2 -MinBytes 200MB -Download {
+    Invoke-HfDownload -Cli $cli -Repo 'm-a-p/YuE-s2-1B-general' -LocalDir $s2 -Include @('*.safetensors', '*.bin', '*.json', '*.model', '*.txt')
+  }
+  Pull-IfMissing -Label 'YuE vocoder (xcodec_mini_infer)' -Target $codec -MinBytes 20MB -Download {
+    Invoke-HfDownload -Cli $cli -Repo 'm-a-p/xcodec_mini_infer' -LocalDir $codec -Include @('*.safetensors', '*.pth', '*.pt', '*.json', '*.yaml', '*.txt')
+  }
+
+  if (Test-Path (Split-Path $yueCustom -Parent)) {
+    Pull-IfMissing -Label 'YuE custom-node models copy' -Target $yueCustom -MinBytes 1GB -Download {
+      Ensure-Dir $yueCustom
+      Copy-Item -Recurse -Force (Join-Path $yueRoot '*') $yueCustom
+    }
+  } else {
+    Write-Skip "ComfyUI-YuE custom node not installed — YuE weights stay in models\YuE"
+  }
+}
+
+$after = Get-DirBytes (Join-Path $root 'models')
+$delta = [Math]::Max(0, $after - $before)
+
+Write-Host ""
+Write-Host "------------------------------------------------------------" -ForegroundColor DarkGray
+Write-Host "Downloaded: $($downloaded.Count)" -ForegroundColor Green
+foreach ($item in $downloaded) { Write-Host "  + $item" -ForegroundColor Green }
+Write-Host "Skipped (already verified): $($skipped.Count)" -ForegroundColor DarkYellow
+foreach ($item in $skipped) { Write-Host "  = $item" -ForegroundColor DarkYellow }
+Write-Host "Models tree size: $(Format-Bytes $after)  (this run +$(Format-Bytes $delta))" -ForegroundColor Cyan
+Write-Host "Restart ComfyUI if it was running so new checkpoints appear." -ForegroundColor DarkGray
+Write-Host "------------------------------------------------------------" -ForegroundColor DarkGray
diff --git a/server/api/generate/active.get.ts b/server/api/generate/active.get.ts
index 5184132..d8127b3 100644
--- a/server/api/generate/active.get.ts
+++ b/server/api/generate/active.get.ts
@@ -32,11 +32,13 @@ export default defineEventHandler(async (event) => {
   const live = listJobs()
     .filter(job => job.library?.ownerKey === owner && jobLooksLive(job, comfyBusy))
     .sort((a, b) => b.startedAt - a.startedAt)
-  const videoLive = live.find(job => job.kind !== 'edit')
+  const videoLive = live.find(job => job.kind !== 'edit' && job.kind !== 'music')
   const editLive = live.find(job => job.kind === 'edit')
+  const musicLive = live.find(job => job.kind === 'music')
 
   let video = videoLive ? livePayload(videoLive) : null
   const edit = editLive ? livePayload(editLive) : null
+  const music = musicLive ? livePayload(musicLive) : null
 
   if (!video) {
     const pending = listPendingJobs()
@@ -70,8 +72,9 @@ export default defineEventHandler(async (event) => {
   }
 
   return {
-    jobId: video?.jobId || edit?.jobId || null,
+    jobId: video?.jobId || edit?.jobId || music?.jobId || null,
     video,
-    edit
+    edit,
+    music
   }
 })
diff --git a/server/api/generate/music.post.ts b/server/api/generate/music.post.ts
new file mode 100644
index 0000000..3f52742
--- /dev/null
+++ b/server/api/generate/music.post.ts
@@ -0,0 +1,100 @@
+import { startMusicJob } from '~/server/utils/musicChain'
+import { comfyConfigured } from '~/server/utils/comfy'
+import {
+  clampLyricsStrength,
+  clampMusicCfg,
+  clampMusicDuration,
+  clampMusicSteps,
+  parseMusicEngine,
+  parseMusicSeed,
+  sanitizeMusicLyrics,
+  sanitizeMusicTags
+} from '~/utils/music'
+
+export default defineEventHandler(async (event) => {
+  const body = await readBody<{
+    tags?: unknown
+    lyrics?: unknown
+    duration?: unknown
+    steps?: unknown
+    seed?: unknown
+    cfg?: unknown
+    lyricsStrength?: unknown
+    instrumental?: unknown
+    folderId?: unknown
+    name?: unknown
+    engine?: unknown
+    sampler_name?: unknown
+    scheduler?: unknown
+  }>(event).catch(() => ({} as Record<string, unknown>))
+
+  if (!comfyConfigured()) {
+    throw createError({
+      statusCode: 503,
+      statusMessage: 'Beast ComfyUI is not configured. Set COMFY_HOST.'
+    })
+  }
+
+  const instrumental = body.instrumental === true || body.instrumental === 'true'
+  const tags = sanitizeMusicTags(body.tags)
+  const lyrics = sanitizeMusicLyrics(body.lyrics, instrumental)
+  if (!tags) {
+    throw createError({ statusCode: 400, statusMessage: 'Genre and style tags are required' })
+  }
+  if (!instrumental && !lyrics) {
+    throw createError({ statusCode: 400, statusMessage: 'Lyrics are required unless Instrumental is on' })
+  }
+
+  const ownerKey = libraryOwnerKey(event)
+  const library = publicLibrary(event)
+  const folderId = library.folders.some(folder => folder.id === String(body.folderId || ''))
+    ? String(body.folderId)
+    : library.folders[0]?.id
+  if (!folderId) {
+    throw createError({ statusCode: 400, statusMessage: 'Create a library folder before generating' })
+  }
+  assertFolderExists(event, folderId)
+  const destFolder = library.folders.find(folder => folder.id === folderId)
+  const folderLocked = Boolean(destFolder?.protected && !destFolder.unlocked)
+
+  const duration = clampMusicDuration(body.duration)
+  const steps = clampMusicSteps(body.steps)
+  const cfg = clampMusicCfg(body.cfg)
+  const lyricsStrength = clampLyricsStrength(body.lyricsStrength)
+  const seed = parseMusicSeed(body.seed)
+  const engine = parseMusicEngine(body.engine)
+  const clipName = allocateOutputName(ownerKey, folderId, String(body.name || '').trim(), {
+    engine: engine === 'ace-step-1.5' ? 'ace15' : 'ace'
+  })
+
+  const job = await startMusicJob({
+    ownerKey,
+    folderId,
+    name: clipName,
+    tags,
+    lyrics,
+    duration,
+    steps,
+    seed,
+    cfg,
+    lyricsStrength,
+    instrumental,
+    folderLocked,
+    engine,
+    samplerName: String(body.sampler_name || 'euler'),
+    scheduler: String(body.scheduler || 'simple')
+  })
+
+  return {
+    jobId: job.id,
+    queued: job.status === 'queued',
+    seed,
+    duration,
+    steps,
+    cfg,
+    folderId,
+    folderLocked,
+    engine,
+    name: clipName
+  }
+})
diff --git a/server/api/library/tracks/[id].delete.ts b/server/api/library/tracks/[id].delete.ts
new file mode 100644
index 0000000..1b65fbf
--- /dev/null
+++ b/server/api/library/tracks/[id].delete.ts
@@ -0,0 +1,8 @@
+export default defineEventHandler(async (event) => {
+  const { owner } = assertLibraryOwner(event)
+  const id = String(getRouterParam(event, 'id') || '')
+  const track = getTrack(owner, id)
+  assertFolderAccess(event, track.folderId)
+  await deleteTrack(owner, id)
+  return { ok: true }
+})
diff --git a/server/api/library/tracks/[id].patch.ts b/server/api/library/tracks/[id].patch.ts
new file mode 100644
index 0000000..f7431d4
--- /dev/null
+++ b/server/api/library/tracks/[id].patch.ts
@@ -0,0 +1,18 @@
+export default defineEventHandler(async (event) => {
+  const { owner } = assertLibraryOwner(event)
+  const id = String(getRouterParam(event, 'id') || '')
+  const body = await readBody<{ folderId?: string; name?: string }>(event).catch(() => ({} as { folderId?: string; name?: string }))
+  const folderId = String(body?.folderId || '')
+  const hasName = typeof body?.name === 'string'
+  if (!folderId && !hasName) {
+    throw createError({ statusCode: 400, statusMessage: 'Choose a library folder or a new name' })
+  }
+  const track = getTrack(owner, id)
+  assertFolderAccess(event, track.folderId)
+  if (folderId) {
+    assertFolderExists(event, folderId)
+    await moveTrack(owner, id, folderId)
+  }
+  if (hasName) await renameTrack(owner, id, body.name || '')
+  return publicLibrary(event)
+})
diff --git a/server/api/library/tracks/[id]/audio.get.ts b/server/api/library/tracks/[id]/audio.get.ts
new file mode 100644
index 0000000..5751eea
--- /dev/null
+++ b/server/api/library/tracks/[id]/audio.get.ts
@@ -0,0 +1,19 @@
+import { existsSync } from 'node:fs'
+import { sendPathWithRange } from '~/server/utils/httpRange'
+import { musicContentType } from '~/utils/music'
+
+export default defineEventHandler((event) => {
+  const { owner } = assertLibraryOwner(event)
+  const id = String(getRouterParam(event, 'id') || '')
+  const track = getTrack(owner, id)
+  assertFolderAccess(event, track.folderId)
+  const path = trackAudioPath(owner, track.id, track.ext)
+  if (!existsSync(path)) {
+    throw createError({ statusCode: 404, statusMessage: 'Audio file is missing' })
+  }
+  const ext = track.ext || 'flac'
+  return sendPathWithRange(event, path, musicContentType(ext), {
+    'Content-Disposition': `inline; filename="${safeDownloadName(track.name)}.${ext}"`,
+    'Cache-Control': 'private, max-age=0, must-revalidate'
+  })
+})
diff --git a/server/api/media.get.ts b/server/api/media.get.ts
index 58a001b..ad23346 100644
--- a/server/api/media.get.ts
+++ b/server/api/media.get.ts
@@ -11,10 +11,20 @@ export default defineEventHandler(async (event) => {
   const params = new URLSearchParams({ filename, subfolder, type })
   const res = await comfyFetch(`/view?${params.toString()}`)
   if (!res.ok) {
-    throw createError({ statusCode: res.status, statusMessage: 'Failed to fetch video from ComfyUI' })
+    throw createError({ statusCode: res.status, statusMessage: 'Failed to fetch media from ComfyUI' })
   }
   const buf = Buffer.from(await res.arrayBuffer())
-  return sendBufferWithRange(event, buf, res.headers.get('content-type') || 'video/mp4', {
+  const lower = filename.toLowerCase()
+  const fallbackType = lower.endsWith('.wav')
+    ? 'audio/wav'
+    : lower.endsWith('.flac')
+      ? 'audio/flac'
+      : lower.endsWith('.mp3')
+        ? 'audio/mpeg'
+        : lower.endsWith('.ogg') || lower.endsWith('.opus')
+          ? 'audio/ogg'
+          : 'video/mp4'
+  return sendBufferWithRange(event, buf, res.headers.get('content-type') || fallbackType, {
     'Content-Disposition': `inline; filename="${filename}"`,
     'Cache-Control': 'private, max-age=0, must-revalidate'
   })
diff --git a/server/assets/workflow_ace_step.json b/server/assets/workflow_ace_step.json
new file mode 100644
index 0000000..783ef6c
--- /dev/null
+++ b/server/assets/workflow_ace_step.json
@@ -0,0 +1,120 @@
+{
+  "14": {
+    "inputs": {
+      "ckpt_name": "ace_step_v1_3.5b.safetensors"
+    },
+    "class_type": "CheckpointLoaderSimple",
+    "_meta": {
+      "title": "Load Checkpoint"
+    }
+  },
+  "40": {
+    "inputs": {
+      "tags": "modern synthpop, 120 bpm, female vocals, punchy bass, analog synths",
+      "lyrics": "[Verse 1]\n\n[Chorus]\n\n[Guitar Solo]\n\n[Outro]\n",
+      "lyrics_strength": 0.9,
+      "clip": [
+        "14",
+        1
+      ]
+    },
+    "class_type": "TextEncodeAceStepAudio",
+    "_meta": {
+      "title": "Tags & Lyrics"
+    }
+  },
+  "47": {
+    "inputs": {
+      "conditioning": [
+        "40",
+        0
+      ]
+    },
+    "class_type": "ConditioningZeroOut",
+    "_meta": {
+      "title": "Negative (zeroed)"
+    }
+  },
+  "17": {
+    "inputs": {
+      "seconds": 60,
+      "batch_size": 1
+    },
+    "class_type": "EmptyAceStepLatentAudio",
+    "_meta": {
+      "title": "Audio Length"
+    }
+  },
+  "45": {
+    "inputs": {
+      "shift": 5,
+      "model": [
+        "14",
+        0
+      ]
+    },
+    "class_type": "ModelSamplingSD3",
+    "_meta": {
+      "title": "Model Sampling SD3"
+    }
+  },
+  "3": {
+    "inputs": {
+      "seed": 0,
+      "steps": 50,
+      "cfg": 5,
+      "sampler_name": "euler",
+      "scheduler": "simple",
+      "denoise": 1,
+      "model": [
+        "45",
+        0
+      ],
+      "positive": [
+        "40",
+        0
+      ],
+      "negative": [
+        "47",
+        0
+      ],
+      "latent_image": [
+        "17",
+        0
+      ]
+    },
+    "class_type": "KSampler",
+    "_meta": {
+      "title": "Audio Sampler"
+    }
+  },
+  "16": {
+    "inputs": {
+      "samples": [
+        "3",
+        0
+      ],
+      "vae": [
+        "14",
+        2
+      ]
+    },
+    "class_type": "VAEDecodeAudio",
+    "_meta": {
+      "title": "VAE Decode Audio"
+    }
+  },
+  "19": {
+    "inputs": {
+      "filename_prefix": "audio/AIGen",
+      "audio": [
+        "16",
+        0
+      ]
+    },
+    "class_type": "SaveAudio",
+    "_meta": {
+      "title": "Save Audio"
+    }
+  }
+}
diff --git a/server/utils/comfy.ts b/server/utils/comfy.ts
index 9d0c0d1..d24ac2b 100644
--- a/server/utils/comfy.ts
+++ b/server/utils/comfy.ts
@@ -243,6 +243,58 @@ function findVideo(value: unknown, depth = 0): { filename: string; subfolder: st
   return null
 }
 
+function isAudioFile(item: { filename?: string; format?: string } | null | undefined) {
+  if (!item) return false
+  const name = String(item.filename || '').toLowerCase()
+  const format = String(item.format || '').toLowerCase()
+  return name.endsWith('.wav') || name.endsWith('.flac') || name.endsWith('.mp3') || name.endsWith('.ogg') || name.endsWith('.opus')
+    || format.includes('audio') || format.includes('wav') || format.includes('flac')
+}
+
+function normalizeAudio(item: { filename?: string; subfolder?: string; type?: string }) {
+  return {
+    filename: String(item.filename),
+    subfolder: String(item.subfolder || ''),
+    type: String(item.type || 'output')
+  }
+}
+
+function findAudio(value: unknown, depth = 0): { filename: string; subfolder: string; type: string } | null {
+  if (!value || typeof value !== 'object' || depth > 8) return null
+  if (Array.isArray(value)) {
+    const files = value.filter((item): item is { filename?: string; format?: string; subfolder?: string; type?: string } => Boolean(item && typeof item === 'object'))
+    const match = files.find(item => {
+      const name = String(item.filename || '').toLowerCase()
+      return name.endsWith('.flac') || name.endsWith('.wav')
+    }) || files.find(isAudioFile)
+    if (match?.filename) return normalizeAudio(match)
+    for (const item of value) {
+      const nested = findAudio(item, depth + 1)
+      if (nested) return nested
+    }
+    return null
+  }
+  const record = value as { filename?: string; format?: string; subfolder?: string; type?: string }
+  if (record.filename && isAudioFile(record)) return normalizeAudio(record)
+  for (const nested of Object.values(value as Record<string, unknown>)) {
+    const found = findAudio(nested, depth + 1)
+    if (found) return found
+  }
+  return null
+}
+
+export function extractAudio(history: Record<string, unknown> | null, promptId: string) {
+  if (!history) return null
+  const wrapped = history[promptId] as { outputs?: Record<string, unknown> } | undefined
+  if (wrapped) {
+    return findAudio(wrapped.outputs || {}) || findAudio(wrapped)
+  }
+  if ((history as { outputs?: unknown }).outputs) {
+    return findAudio((history as { outputs?: unknown }).outputs) || findAudio(history)
+  }
+  return findAudio(history)
+}
+
 export function extractVideo(history: Record<string, unknown> | null, promptId: string) {
   if (!history) return null
   const wrapped = history[promptId] as { outputs?: Record<string, unknown> } | undefined
diff --git a/server/utils/jobs.ts b/server/utils/jobs.ts
index a04d419..704979a 100644
--- a/server/utils/jobs.ts
+++ b/server/utils/jobs.ts
@@ -12,6 +12,7 @@ export interface JobEvent {
   mediaType?: string
   clipId?: string
   stillId?: string
+  trackId?: string
   hideThumbnail?: boolean
   error?: string
   elapsedMs?: number
@@ -31,7 +32,7 @@ export interface JobEvent {
 
 export interface Job {
   id: string
-  kind?: 'video' | 'edit'
+  kind?: 'video' | 'edit' | 'music'
   promptId?: string
   clientId: string
   status: JobStatus
@@ -41,8 +42,10 @@ export interface Job {
   maxStep: number
   startedAt: number
   video?: { filename: string; subfolder: string; type: string }
+  audio?: { filename: string; subfolder: string; type: string }
   clipId?: string
   stillId?: string
+  trackId?: string
   hideThumbnail?: boolean
   imageComfyHost?: string
   library?: {
@@ -102,6 +105,12 @@ export interface Job {
     loraStack?: import('~/utils/loras').LoraStackItem[]
     shotLoras?: string[]
     shotLoraStacks?: import('~/utils/loras').LoraStackItem[][]
+    tags?: string
+    lyrics?: string
+    instrumental?: boolean
+    audioExt?: string
+    engine?: string
+    lyricsStrength?: number
   }
   error?: string
   socketReady?: boolean
@@ -115,9 +124,10 @@ export interface Job {
 const jobs = new Map<string, Job>()
 const MAX_JOBS = 40
 
-export function createJob(): Job {
+export function createJob(kind: Job['kind'] = 'video'): Job {
   const job: Job = {
     id: crypto.randomUUID(),
+    kind,
     clientId: crypto.randomUUID(),
     status: 'queued',
     message: 'Queued',
@@ -175,6 +185,7 @@ export function listJobs() {
 }
 
 export function jobSnapshot(job: Job) {
+  const media = job.kind === 'music' ? job.audio : job.video
   return {
     jobId: job.id,
     kind: job.kind || 'video',
@@ -186,11 +197,12 @@ export function jobSnapshot(job: Job) {
     maxStep: job.maxStep,
     promptId: job.promptId,
     elapsedMs: Date.now() - job.startedAt,
-    filename: job.library?.folderLocked ? undefined : job.video?.filename,
-    subfolder: job.library?.folderLocked ? undefined : job.video?.subfolder,
-    mediaType: job.library?.folderLocked ? undefined : job.video?.type,
+    filename: job.library?.folderLocked ? undefined : media?.filename,
+    subfolder: job.library?.folderLocked ? undefined : media?.subfolder,
+    mediaType: job.library?.folderLocked ? undefined : media?.type,
     clipId: job.clipId,
     stillId: job.stillId,
+    trackId: job.trackId,
     hideThumbnail: job.hideThumbnail,
     error: job.error,
     folderLocked: job.library?.folderLocked,
diff --git a/server/utils/library.ts b/server/utils/library.ts
index 82aaaef..1597c33 100644
--- a/server/utils/library.ts
+++ b/server/utils/library.ts
@@ -66,6 +66,27 @@ export interface LibraryClip {
   promptPost?: string
 }
 
+export interface LibraryTrack {
+  id: string
+  folderId: string
+  name: string
+  tags: string
+  lyrics: string
+  duration: number
+  steps: number
+  seed: number
+  cfg: number
+  instrumental: boolean
+  createdAt: number
+  filename: string
+  ext: string
+  engine?: string
+  samplerName?: string
+  scheduler?: string
+  lyricsStrength?: number
+  comfyFilename?: string
+}
+
 export type StillRole = 'input' | 'output'
 
 export interface LibraryStill {
@@ -97,6 +118,7 @@ export interface PublicFolder {
   unlocked: boolean
   clipCount: number
   imageCount: number
+  trackCount: number
 }
 
 export interface QueuedExtension {
@@ -146,6 +168,7 @@ interface Catalog {
   folders: LibraryFolder[]
   clips: LibraryClip[]
   stills: LibraryStill[]
+  tracks: LibraryTrack[]
   drafts: RetryDraft[]
   loraAliases: Record<string, string>
   loraTriggers: Record<string, string>
@@ -188,6 +211,7 @@ function emptyCatalog(): Catalog {
     }],
     clips: [],
     stills: [],
+    tracks: [],
     drafts: [],
     loraAliases: {},
     loraTriggers: {},
@@ -239,6 +263,30 @@ function normalizeStill(still: LibraryStill): LibraryStill {
   }
 }
 
+function normalizeTrack(track: LibraryTrack): LibraryTrack {
+  const ext = String(track.ext || track.filename || 'flac').replace(/^\./, '').toLowerCase() || 'flac'
+  return {
+    id: track.id,
+    folderId: track.folderId,
+    name: String(track.name || '').trim() || 'Untitled track',
+    tags: String(track.tags || ''),
+    lyrics: String(track.lyrics || ''),
+    duration: Number(track.duration) || 0,
+    steps: Number(track.steps) || 0,
+    seed: Number(track.seed) || 0,
+    cfg: Number(track.cfg) || 0,
+    instrumental: track.instrumental === true,
+    createdAt: track.createdAt || Date.now(),
+    filename: String(track.filename || `audio.${ext}`),
+    ext,
+    engine: track.engine,
+    samplerName: track.samplerName,
+    scheduler: track.scheduler,
+    lyricsStrength: track.lyricsStrength,
+    comfyFilename: track.comfyFilename
+  }
+}
+
 function normalizeCatalog(parsed: Partial<Catalog> & { passwordHash?: string | null }): Catalog {
   const folders = Array.isArray(parsed.folders) && parsed.folders.length
     ? parsed.folders.map(normalizeFolder)
@@ -252,6 +300,7 @@ function normalizeCatalog(parsed: Partial<Catalog> & { passwordHash?: string | n
     folders,
     clips: Array.isArray(parsed.clips) ? parsed.clips : [],
     stills: Array.isArray(parsed.stills) ? parsed.stills.map(normalizeStill) : [],
+    tracks: Array.isArray(parsed.tracks) ? parsed.tracks.map(normalizeTrack) : [],
     drafts: Array.isArray(parsed.drafts) ? parsed.drafts : [],
     loraAliases: normalizeLoraAliases(parsed.loraAliases),
     loraTriggers: normalizeLoraTriggers(parsed.loraTriggers),
@@ -284,6 +333,7 @@ function migrateLegacy(owner: string) {
 function ensureOwner(owner: string) {
   mkdirSync(join(ownerRoot(owner), 'files'), { recursive: true })
   mkdirSync(join(ownerRoot(owner), 'stills'), { recursive: true })
+  mkdirSync(join(ownerRoot(owner), 'tracks'), { recursive: true })
   migrateLegacy(owner)
 }
 
@@ -392,7 +442,11 @@ function existingOutputNames(catalog: Catalog, folderId: string) {
     .filter(item => item.folderId === folderId)
     .map(item => String(item.name || '').trim())
     .filter(Boolean)
-  return [...stills, ...clips]
+  const tracks = catalog.tracks
+    .filter(item => item.folderId === folderId)
+    .map(item => String(item.name || '').trim())
+    .filter(Boolean)
+  return [...stills, ...clips, ...tracks]
 }
 
 export function getLoraAliases(owner: string) {
@@ -481,7 +535,7 @@ export function folderUnlocked(event: H3Event, folder: LibraryFolder) {
   return folderUnlocks(event)[folder.id] === passwordVersion(folder.passwordHash)
 }
 
-export function publicFolder(event: H3Event, folder: LibraryFolder, clipCount = 0, imageCount = 0): PublicFolder {
+export function publicFolder(event: H3Event, folder: LibraryFolder, clipCount = 0, imageCount = 0, trackCount = 0): PublicFolder {
   return {
     id: folder.id,
     name: folder.name,
@@ -490,7 +544,8 @@ export function publicFolder(event: H3Event, folder: LibraryFolder, clipCount =
     protected: Boolean(folder.passwordHash),
     unlocked: folderUnlocked(event, folder),
     clipCount,
-    imageCount
+    imageCount,
+    trackCount
   }
 }
 
@@ -501,6 +556,7 @@ export function publicLibrary(event: H3Event, opts?: { light?: boolean }) {
   const clipIds = new Set(catalog.clips.map(clip => clip.id.toLowerCase()))
   const clipCounts = new Map<string, number>()
   const imageCounts = new Map<string, number>()
+  const trackCounts = new Map<string, number>()
   for (const clip of catalog.clips) {
     clipCounts.set(clip.folderId, (clipCounts.get(clip.folderId) || 0) + 1)
   }
@@ -508,11 +564,15 @@ export function publicLibrary(event: H3Event, opts?: { light?: boolean }) {
     if (isPipelineStill(catalog, still, clipIds) || stillRole(still) !== 'output') continue
     imageCounts.set(still.folderId, (imageCounts.get(still.folderId) || 0) + 1)
   }
+  for (const track of catalog.tracks || []) {
+    trackCounts.set(track.folderId, (trackCounts.get(track.folderId) || 0) + 1)
+  }
   const folders = catalog.folders.map(folder => publicFolder(
     event,
     folder,
     clipCounts.get(folder.id) || 0,
-    imageCounts.get(folder.id) || 0
+    imageCounts.get(folder.id) || 0,
+    trackCounts.get(folder.id) || 0
   ))
   const unlockedIds = new Set(folders.filter(folder => folder.unlocked).map(folder => folder.id))
   return {
@@ -526,6 +586,12 @@ export function publicLibrary(event: H3Event, opts?: { light?: boolean }) {
     stills: catalog.stills
       .filter(still => unlockedIds.has(still.folderId) && !isPipelineStill(catalog, still, clipIds))
       .map(still => ({ ...still, role: stillRole(still) })),
+    tracks: (catalog.tracks || [])
+      .filter(track => unlockedIds.has(track.folderId))
+      .map(track => ({
+        ...track,
+        hasAudio: light ? true : existsSync(trackAudioPath(owner, track.id, track.ext))
+      })),
     drafts: catalog.drafts,
     loraAliases: catalog.loraAliases || {},
     loraTriggers: catalog.loraTriggers || {},
@@ -599,15 +665,20 @@ export function deleteFolder(owner: string, id: string) {
     if (!folder) throw createError({ statusCode: 404, statusMessage: 'Folder not found' })
     const clips = catalog.clips.filter(clip => clip.folderId === id)
     const stills = catalog.stills.filter(still => still.folderId === id)
+    const tracks = (catalog.tracks || []).filter(track => track.folderId === id)
     catalog.folders = catalog.folders.filter(item => item.id !== id)
     catalog.clips = catalog.clips.filter(clip => clip.folderId !== id)
     catalog.stills = catalog.stills.filter(still => still.folderId !== id)
+    catalog.tracks = (catalog.tracks || []).filter(track => track.folderId !== id)
     for (const clip of clips) {
       rmSync(clipDir(owner, clip.id), { recursive: true, force: true })
     }
     for (const still of stills) {
       removeStillFiles(owner, still.id)
     }
+    for (const track of tracks) {
+      rmSync(trackDir(owner, track.id), { recursive: true, force: true })
+    }
     return { fallbackFolderId: catalog.folders[0].id }
   })
 }
@@ -695,6 +766,25 @@ export function clipVideoPath(owner: string, id: string) {
   return join(clipDir(owner, id), 'video.mp4')
 }
 
+export function trackDir(owner: string, id: string) {
+  const current = join(ownerRoot(owner), 'tracks', id)
+  if (existsSync(current)) return current
+  const legacy = join(libraryRoot(), 'tracks', id)
+  if (existsSync(legacy)) return legacy
+  return current
+}
+
+export function trackAudioPath(owner: string, id: string, ext = 'flac') {
+  const dir = trackDir(owner, id)
+  const wanted = join(dir, `audio.${String(ext || 'flac').replace(/^\./, '')}`)
+  if (existsSync(wanted)) return wanted
+  for (const fallback of ['flac', 'wav', 'mp3', 'ogg', 'opus']) {
+    const path = join(dir, `audio.${fallback}`)
+    if (existsSync(path)) return path
+  }
+  return wanted
+}
+
 export function clipLastFramePath(owner: string, id: string) {
   return join(clipDir(owner, id), 'last-frame.png')
 }
@@ -1653,6 +1743,103 @@ export function getClip(owner: string, id: string) {
   return clip
 }
 
+export function getTrack(owner: string, id: string) {
+  const track = readCatalog(owner).tracks.find(item => item.id === id)
+  if (!track) throw createError({ statusCode: 404, statusMessage: 'Track not found' })
+  return track
+}
+
+export async function saveTrack(params: {
+  ownerKey: string
+  folderId: string
+  name?: string
+  tags: string
+  lyrics: string
+  duration: number
+  steps: number
+  seed: number
+  cfg: number
+  instrumental: boolean
+  audio: Buffer
+  ext?: string
+  engine?: string
+  samplerName?: string
+  scheduler?: string
+  lyricsStrength?: number
+  comfyFilename?: string
+}) {
+  const catalog = readCatalog(params.ownerKey)
+  const folder = catalog.folders.find(item => item.id === params.folderId) || catalog.folders[0]
+  if (!folder) throw createError({ statusCode: 400, statusMessage: 'No library folder available' })
+  const ext = String(params.ext || 'flac').replace(/^\./, '').toLowerCase() || 'flac'
+  const track: LibraryTrack = {
+    id: crypto.randomUUID(),
+    folderId: folder.id,
+    name: clipTitle({ name: params.name || '', prompt: params.tags }),
+    tags: params.tags,
+    lyrics: params.lyrics,
+    duration: params.duration,
+    steps: params.steps,
+    seed: params.seed,
+    cfg: params.cfg,
+    instrumental: params.instrumental === true,
+    createdAt: Date.now(),
+    filename: `audio.${ext}`,
+    ext,
+    engine: params.engine,
+    samplerName: params.samplerName,
+    scheduler: params.scheduler,
+    lyricsStrength: params.lyricsStrength,
+    comfyFilename: params.comfyFilename
+  }
+  mkdirSync(trackDir(params.ownerKey, track.id), { recursive: true })
+  await writeFile(trackAudioPath(params.ownerKey, track.id, ext), params.audio)
+  if (!(typeof params.duration === 'number' && params.duration > 0)) {
+    try {
+      track.duration = await probeDuration(trackAudioPath(params.ownerKey, track.id, ext))
+    } catch {
+      /* duration stays as posted */
+    }
+  }
+  await mutate(params.ownerKey, (next) => {
+    if (!Array.isArray(next.tracks)) next.tracks = []
+    next.tracks.unshift(track)
+  })
+  return track
+}
+
+export function deleteTrack(owner: string, id: string) {
+  return mutate(owner, (catalog) => {
+    const track = catalog.tracks.find(item => item.id === id)
+    if (!track) throw createError({ statusCode: 404, statusMessage: 'Track not found' })
+    catalog.tracks = catalog.tracks.filter(item => item.id !== id)
+    rmSync(trackDir(owner, id), { recursive: true, force: true })
+    return track
+  })
+}
+
+export function moveTrack(owner: string, id: string, folderId: string) {
+  return mutate(owner, (catalog) => {
+    const track = catalog.tracks.find(item => item.id === id)
+    if (!track) throw createError({ statusCode: 404, statusMessage: 'Track not found' })
+    const folder = catalog.folders.find(item => item.id === folderId)
+    if (!folder) throw createError({ statusCode: 404, statusMessage: 'Folder not found' })
+    track.folderId = folderId
+    return track
+  })
+}
+
+export function renameTrack(owner: string, id: string, name: string) {
+  return mutate(owner, (catalog) => {
+    const track = catalog.tracks.find(item => item.id === id)
+    if (!track) throw createError({ statusCode: 404, statusMessage: 'Track not found' })
+    const cleaned = String(name || '').trim().slice(0, 80)
+    if (!cleaned) throw createError({ statusCode: 400, statusMessage: 'A name is required' })
+    track.name = cleaned
+    return track
+  })
+}
+
 function stampFamilyId(family: LibraryClip[], fallback?: string) {
   const familyId = family.find(item => item.familyId)?.familyId || fallback || crypto.randomUUID()
   for (const item of family) item.familyId = familyId
@@ -1791,6 +1978,22 @@ export async function downloadComfyVideo(video: { filename: string; subfolder: s
   throw new Error(`Failed to fetch completed video from ComfyUI (${lastStatus})`)
 }
 
+export async function downloadComfyAudio(audio: { filename: string; subfolder: string; type: string }) {
+  const subfolders = [...new Set([audio.subfolder, 'audio', ''])]
+  let lastStatus = 0
+  for (const subfolder of subfolders) {
+    const params = new URLSearchParams({
+      filename: audio.filename,
+      subfolder,
+      type: audio.type || 'output'
+    })
+    const res = await comfyFetch(`/view?${params.toString()}`)
+    lastStatus = res.status
+    if (res.ok) return Buffer.from(await res.arrayBuffer())
+  }
+  throw new Error(`Failed to fetch completed audio from ComfyUI (${lastStatus})`)
+}
+
 export async function importMissingComfyVideos(owner: string, folderId?: string) {
   const catalog = readCatalog(owner)
   const folder = catalog.folders.find(item => item.id === folderId) || catalog.folders[0]
diff --git a/server/utils/musicChain.ts b/server/utils/musicChain.ts
new file mode 100644
index 0000000..947e281
--- /dev/null
+++ b/server/utils/musicChain.ts
@@ -0,0 +1,352 @@
+import { createJob, emitJob, type Job } from '~/server/utils/jobs'
+import { extractAudio, fetchHistory, queuePrompt } from '~/server/utils/comfy'
+import { comfyWsUrl } from '~/server/utils/comfy'
+import { ensureComfyReady } from '~/server/utils/comfyLifecycle'
+import { downloadComfyAudio, saveTrack } from '~/server/utils/library'
+import { buildMusicWorkflow, musicFilenamePrefix } from '~/server/utils/musicWorkflow'
+import { NODE_LABELS } from '~/server/utils/workflow'
+import { musicExtension } from '~/utils/music'
+import type { MusicEngine } from '~/utils/music'
+
+export type MusicJobParams = {
+  ownerKey: string
+  folderId: string
+  name: string
+  tags: string
+  lyrics: string
+  duration: number
+  steps: number
+  seed: number
+  cfg: number
+  lyricsStrength: number
+  instrumental: boolean
+  folderLocked?: boolean
+  engine?: MusicEngine
+  samplerName?: string
+  scheduler?: string
+}
+
+function sleep(ms: number) {
+  return new Promise(resolve => setTimeout(resolve, ms))
+}
+
+function classifyError(message: string) {
+  const lower = message.toLowerCase()
+  if (lower.includes('out of memory') || (lower.includes('cuda') && lower.includes('alloc')) || lower.includes('vram')) {
+    return 'ComfyUI VRAM allocation failed. Try fewer steps or a shorter duration.'
+  }
+  if (lower.includes('econnrefused') || lower.includes('unreachable') || lower.includes('fetch failed')) {
+    return 'ComfyUI host connection dropped. Confirm the desktop instance is running.'
+  }
+  if (lower.includes('timeout')) {
+    return 'Network timeout talking to ComfyUI. The job may still be running on the desktop.'
+  }
+  return message
+}
+
+function nodeLabel(node: string) {
+  if (!node) return ''
+  return NODE_LABELS[node] || ''
+}
+
+async function waitForSocket(job: Job, ms = 4000) {
+  const started = Date.now()
+  while (Date.now() - started < ms) {
+    if (job.socketReady) return
+    await sleep(100)
+  }
+}
+
+function watchMusicJob(job: Job): Promise<void> {
+  job.socketReady = false
+  job.saving = false
+  const ws = new WebSocket(comfyWsUrl(job.clientId))
+  let settled = false
+  let finishing = false
+  let pollTimer: ReturnType<typeof setInterval> | null = null
+  let timeout: ReturnType<typeof setTimeout> | null = null
+
+  return new Promise((resolve) => {
+    let localProgress = 0
+    const startedAt = Date.now()
+    let lastActivity = Date.now()
+    const IDLE_MS = 30 * 60 * 1000
+    const ABSOLUTE_MS = 3 * 60 * 60 * 1000
+
+    const markActivity = () => { lastActivity = Date.now() }
+
+    const emitLocal = (event: Parameters<typeof emitJob>[1], samplePct?: number) => {
+      markActivity()
+      if (typeof event.progress === 'number') localProgress = event.progress
+      if (event.message && typeof samplePct === 'number') {
+        event.message = `${event.message} (${samplePct}%)`
+      }
+      emitJob(job, event)
+    }
+
+    const cleanup = () => {
+      if (timeout) clearTimeout(timeout)
+      if (pollTimer) clearInterval(pollTimer)
+      timeout = null
+      pollTimer = null
+      try { ws.close() } catch { /* ignore */ }
+    }
+
+    const armIdle = () => {
+      if (timeout) clearTimeout(timeout)
+      if (settled) return
+      const absLeft = ABSOLUTE_MS - (Date.now() - startedAt)
+      if (absLeft <= 0) {
+        void fail('Timed out waiting for ComfyUI (3 hours).')
+        return
+      }
+      const idleLeft = IDLE_MS - (Date.now() - lastActivity)
+      timeout = setTimeout(() => {
+        if (settled || finishing) return
+        if (Date.now() - lastActivity >= IDLE_MS) {
+          void fail('Timed out waiting for ComfyUI progress (30 minutes with no updates).')
+          return
+        }
+        armIdle()
+      }, Math.max(1000, Math.min(idleLeft, absLeft)))
+    }
+
+    const fail = async (error: string) => {
+      if (settled || finishing) return
+      settled = true
+      cleanup()
+      job.status = job.status === 'cancelled' ? 'cancelled' : 'error'
+      job.error = classifyError(error)
+      emitJob(job, { type: 'error', error: job.error, message: job.error })
+      resolve()
+    }
+
+    const succeed = async () => {
+      if (settled || finishing || !job.promptId) return false
+      finishing = true
+      job.saving = true
+      try {
+        const history = await fetchHistory(job.promptId)
+        const audio = extractAudio(history, job.promptId)
+        if (!audio) {
+          finishing = false
+          job.saving = false
+          return false
+        }
+        if (settled) return false
+        settled = true
+        cleanup()
+        try {
+          job.audio = audio
+          emitLocal({ type: 'status', message: 'Saving to library...', progress: 98 })
+          if (job.library) {
+            const buffer = await downloadComfyAudio(audio)
+            const ext = musicExtension(audio.filename)
+            const track = await saveTrack({
+              ownerKey: job.library.ownerKey,
+              folderId: job.library.folderId,
+              name: job.library.name,
+              tags: job.library.tags || job.library.prompt,
+              lyrics: job.library.lyrics || '',
+              duration: job.library.duration || 0,
+              steps: job.library.steps,
+              seed: job.library.seed,
+              cfg: job.library.cfg || 0,
+              instrumental: job.library.instrumental === true,
+              audio: buffer,
+              ext,
+              engine: job.library.engine,
+              samplerName: job.library.samplerName,
+              scheduler: job.library.scheduler,
+              lyricsStrength: job.library.lyricsStrength,
+              comfyFilename: audio.filename
+            })
+            job.trackId = track.id
+            job.library.audioExt = ext
+          }
+          job.status = 'complete'
+          emitJob(job, {
+            type: 'complete',
+            message: job.library?.folderLocked
+              ? 'Saved to the locked folder. Unlock it to listen.'
+              : 'Track ready',
+            progress: 100,
+            filename: job.library?.folderLocked ? undefined : audio.filename,
+            subfolder: job.library?.folderLocked ? undefined : audio.subfolder,
+            mediaType: job.library?.folderLocked ? undefined : audio.type,
+            trackId: job.trackId,
+            folderLocked: job.library?.folderLocked
+          })
+        } catch (saveError) {
+          const message = saveError instanceof Error ? saveError.message : String(saveError)
+          job.status = 'error'
+          job.error = `Audio generated but library save failed: ${message}`
+          emitJob(job, { type: 'error', error: job.error, message: job.error })
+        }
+        job.saving = false
+        resolve()
+        return true
+      } catch (error) {
+        finishing = false
+        job.saving = false
+        throw error
+      }
+    }
+
+    const pollHistory = async () => {
+      if (settled || finishing || !job.promptId) return
+      try {
+        const history = await fetchHistory(job.promptId)
+        if (extractAudio(history, job.promptId)) {
+          await succeed()
+          return
+        }
+        const entry = (history?.[job.promptId] || history) as {
+          status?: { status_str?: string; completed?: boolean }
+        } | undefined
+        const status = entry?.status?.status_str
+        if (status === 'error') await fail('ComfyUI reported an execution error')
+        else if (status === 'interrupted') await fail('Job interrupted.')
+      } catch {
+        // history can miss while the graph is still running
+      }
+    }
+
+    armIdle()
+    pollTimer = setInterval(() => { void pollHistory() }, 4000)
+
+    ws.addEventListener('open', () => {
+      job.socketReady = true
+      emitLocal({ type: 'status', message: 'Connected to ComfyUI', progress: Math.max(localProgress, 4) })
+    })
+    ws.addEventListener('error', () => {
+      job.socketReady = false
+    })
+    ws.addEventListener('message', (event) => {
+      let payload: { type?: string; data?: Record<string, any> }
+      try {
+        payload = JSON.parse(String(event.data))
+      } catch {
+        return
+      }
+      const type = String(payload.type || '')
+      const data = payload.data || {}
+      if (type === 'status') markActivity()
+      if (type === 'progress') {
+        const value = Number(data.value || 0)
+        const max = Number(data.max || 0)
+        const pct = max > 0 ? Math.min(95, Math.round((value / max) * 90) + 8) : Math.max(localProgress, 12)
+        const node = String(data.node || '')
+        emitLocal({
+          type: 'progress',
+          message: nodeLabel(node) || 'Sampling',
+          progress: pct,
+          step: value,
+          maxStep: max,
+          node
+        }, max > 0 ? Math.round((value / max) * 100) : undefined)
+      }
+      if (type === 'executing') {
+        const node = data.node == null ? '' : String(data.node)
+        if (!node && job.promptId) void succeed()
+        else if (node) {
+          emitLocal({
+            type: 'status',
+            message: nodeLabel(node) || 'Running node',
+            progress: Math.max(localProgress, 10),
+            node
+          })
+        }
+      }
+      if (type === 'executed') {
+        void succeed()
+      }
+      if (type === 'execution_error') {
+        const message = String(data.exception_message || data.message || 'ComfyUI node execution failed')
+        void fail(message)
+      }
+      if (type === 'execution_interrupted') {
+        job.status = 'cancelled'
+        void fail('Job interrupted.')
+      }
+    })
+  })
+}
+
+export async function startMusicJob(params: MusicJobParams) {
+  const job = createJob('music')
+  job.library = {
+    ownerKey: params.ownerKey,
+    folderId: params.folderId,
+    hideThumbnail: false,
+    folderLocked: params.folderLocked === true,
+    name: params.name,
+    prompt: params.tags,
+    tags: params.tags,
+    lyrics: params.lyrics,
+    instrumental: params.instrumental,
+    aspect: 'audio',
+    width: 0,
+    height: 0,
+    steps: params.steps,
+    turbo: false,
+    seed: params.seed,
+    cfg: params.cfg,
+    duration: params.duration,
+    sound: true,
+    engine: params.engine || 'ace-step',
+    samplerName: params.samplerName || 'euler',
+    scheduler: params.scheduler || 'simple',
+    lyricsStrength: params.lyricsStrength
+  }
+  job.maxStep = params.steps
+  job.status = 'queued'
+  emitJob(job, { type: 'status', message: 'Checking ComfyUI...', progress: 1 })
+
+  void (async () => {
+    try {
+      const done = watchMusicJob(job)
+      await ensureComfyReady((status) => {
+        emitJob(job, {
+          type: status.state === 'busy' ? 'busy' : 'status',
+          message: status.message,
+          progress: status.state === 'online' ? 3 : 1,
+          busy: status.state === 'busy',
+          queueRunning: status.queueRunning,
+          queuePending: status.queuePending
+        })
+      })
+      job.status = 'uploading'
+      emitJob(job, { type: 'status', message: 'Queueing ACE-Step...', progress: 6 })
+      await waitForSocket(job, 4000)
+      const graph = buildMusicWorkflow({
+        tags: params.tags,
+        lyrics: params.instrumental ? '' : params.lyrics,
+        duration: params.duration,
+        steps: params.steps,
+        seed: params.seed,
+        cfg: params.cfg,
+        lyricsStrength: params.instrumental ? 0 : params.lyricsStrength,
+        samplerName: params.samplerName,
+        scheduler: params.scheduler,
+        filenamePrefix: musicFilenamePrefix(),
+        engine: params.engine,
+        vocalMultiplier: params.instrumental ? 0.2 : 1
+      })
+      const queued = await queuePrompt(graph, job.clientId)
+      job.promptId = queued.prompt_id
+      job.status = 'running'
+      emitJob(job, { type: 'status', message: 'Job queued on ComfyUI', progress: 8 })
+      await done
+    } catch (error) {
+      const message = error instanceof Error ? error.message : String(error)
+      if (job.status !== 'cancelled' && job.status !== 'complete') {
+        job.status = 'error'
+        job.error = classifyError(message)
+        emitJob(job, { type: 'error', error: job.error, message: job.error })
+      }
+    }
+  })()
+
+  return job
+}
diff --git a/server/utils/musicWorkflow.ts b/server/utils/musicWorkflow.ts
new file mode 100644
index 0000000..80d421f
--- /dev/null
+++ b/server/utils/musicWorkflow.ts
@@ -0,0 +1,68 @@
+import workflowAceStep from '../assets/workflow_ace_step.json'
+import type { MusicEngine } from '~/utils/music'
+
+export type MusicWorkflowParams = {
+  tags: string
+  lyrics: string
+  duration: number
+  steps: number
+  seed: number
+  cfg: number
+  lyricsStrength: number
+  samplerName?: string
+  scheduler?: string
+  filenamePrefix?: string
+  checkpoint?: string
+  engine?: MusicEngine
+  vocalMultiplier?: number
+}
+
+type WorkflowNode = { class_type: string; inputs: Record<string, unknown>; _meta?: { title?: string } }
+type WorkflowGraph = Record<string, WorkflowNode>
+
+const ACE_V1_CKPT = 'ace_step_v1_3.5b.safetensors'
+const ACE_15_CKPT = 'ace_step_1.5_turbo_aio.safetensors'
+
+export function musicFilenamePrefix() {
+  return String(useRuntimeConfig().comfyAudioPrefix || process.env.COMFY_AUDIO_PREFIX || 'audio/AIGen')
+}
+
+export function buildMusicWorkflow(params: MusicWorkflowParams): WorkflowGraph {
+  const graph = structuredClone(workflowAceStep as WorkflowGraph)
+  const engine = params.engine || 'ace-step'
+  const checkpoint = params.checkpoint
+    || (engine === 'ace-step-1.5' ? ACE_15_CKPT : ACE_V1_CKPT)
+  const prefix = params.filenamePrefix || musicFilenamePrefix()
+  const sampler = params.samplerName || 'euler'
+  const scheduler = params.scheduler || 'simple'
+
+  for (const node of Object.values(graph)) {
+    if (node.class_type === 'CheckpointLoaderSimple' && 'ckpt_name' in node.inputs) {
+      node.inputs.ckpt_name = checkpoint
+    }
+    if (node.class_type === 'TextEncodeAceStepAudio') {
+      node.inputs.tags = params.tags
+      node.inputs.lyrics = params.lyrics
+      node.inputs.lyrics_strength = params.lyricsStrength
+    }
+    if (node.class_type === 'EmptyAceStepLatentAudio' && 'seconds' in node.inputs) {
+      node.inputs.seconds = params.duration
+    }
+    if (node.class_type === 'KSampler') {
+      node.inputs.seed = params.seed
+      node.inputs.steps = params.steps
+      node.inputs.cfg = params.cfg
+      node.inputs.sampler_name = sampler
+      node.inputs.scheduler = scheduler
+    }
+    if (node.class_type === 'SaveAudio' && 'filename_prefix' in node.inputs) {
+      node.inputs.filename_prefix = prefix
+    }
+  }
+
+  return graph
+}
+
+export const MUSIC_NODE_LABELS: Record<string, string> = Object.fromEntries(
+  Object.entries(workflowAceStep as WorkflowGraph).map(([id, node]) => [id, node._meta?.title || `Node ${id}`])
+)
diff --git a/server/utils/workflow.ts b/server/utils/workflow.ts
index a913e96..8f4a3b2 100644
--- a/server/utils/workflow.ts
+++ b/server/utils/workflow.ts
@@ -2,6 +2,7 @@
 import workflowV1 from '../assets/workflow_minimax_video.json'
 import workflowV2 from '../assets/workflow_minimax_video_v2.json'
 import workflowLtx from '../assets/workflow_ltx_video.json'
+import { MUSIC_NODE_LABELS } from '~/server/utils/musicWorkflow'
 import { buildIdentityPrompt } from '~/utils/identityPrompt'
 import { applyUserLoraToGraph, resolveGraphLoraNames } from '~/server/utils/loras'
 import type { LoraStackItem } from '~/utils/loras'
@@ -396,6 +397,7 @@ export const NODE_LABELS: Record<string, string> = {
   ...Object.fromEntries(labelsFrom(workflowV1 as WorkflowGraph)),
   ...Object.fromEntries(labelsFrom(workflowV2 as WorkflowGraph)),
   ...Object.fromEntries(labelsFrom(workflowLtx as WorkflowGraph)),
+  ...MUSIC_NODE_LABELS,
   ...LABEL_OVERRIDES
 }
 
diff --git a/utils/generationNotify.ts b/utils/generationNotify.ts
index a4c855c..4eb29a1 100644
--- a/utils/generationNotify.ts
+++ b/utils/generationNotify.ts
@@ -52,12 +52,16 @@ export async function ensureGenerationNotifyPermission() {
   }
 }
 
-export async function notifyGenerationComplete(kind: 'video' | 'image' = 'video') {
+export async function notifyGenerationComplete(kind: 'video' | 'image' | 'music' = 'video') {
   if (!generationNotifySupported() || !generationNotifyPref()) return
   if (Notification.permission !== 'granted') return
   if (typeof document !== 'undefined' && !document.hidden && document.hasFocus()) return
   const title = appName()
-  const body = kind === 'image' ? 'Image generation is complete.' : 'Generation is complete.'
+  const body = kind === 'image'
+    ? 'Image generation is complete.'
+    : kind === 'music'
+      ? 'Music generation is complete.'
+      : 'Generation is complete.'
   const options: NotificationOptions = {
     body,
     icon: appIcon(),
diff --git a/utils/libraryBrowse.ts b/utils/libraryBrowse.ts
index 84f86c6..515495f 100644
--- a/utils/libraryBrowse.ts
+++ b/utils/libraryBrowse.ts
@@ -1,7 +1,7 @@
 import type { StillGenerationSettings } from '~/utils/libraryGeneration'
 import type { LoraStackItem } from '~/utils/loras'
 
-export type LibraryFilter = 'all' | 'images' | 'videos'
+export type LibraryFilter = 'all' | 'images' | 'videos' | 'music'
 export type LibrarySort = 'date-desc' | 'date-asc' | 'name-asc' | 'name-desc' | 'type'
 
 export type LibraryFolder = {
@@ -13,6 +13,7 @@ export type LibraryFolder = {
   unlocked: boolean
   clipCount?: number
   imageCount?: number
+  trackCount?: number
 }
 
 export type LibraryStill = {
@@ -66,15 +67,37 @@ export type LibraryClip = {
   loraStack?: LoraStackItem[]
 }
 
+export type LibraryTrack = {
+  id: string
+  folderId: string
+  name: string
+  tags: string
+  lyrics: string
+  duration: number
+  steps: number
+  seed: number
+  cfg: number
+  instrumental: boolean
+  createdAt: number
+  filename: string
+  ext: string
+  engine?: string
+  samplerName?: string
+  scheduler?: string
+  lyricsStrength?: number
+  hasAudio?: boolean
+}
+
 export type ClipGroup = { key: string; head: LibraryClip; parts: LibraryClip[] }
 export type StillGroup = { key: string; head: LibraryStill; parts: LibraryStill[] }
 export type LibraryEntry = {
-  kind: 'clip' | 'still'
+  kind: 'clip' | 'still' | 'track'
   key: string
   createdAt: number
   name: string
   group?: ClipGroup
   stillGroup?: StillGroup
+  track?: LibraryTrack
 }
 
 export function familyBaseName(name: string) {
@@ -248,6 +271,7 @@ export function stillCollectionTitle(group: StillGroup) {
 
 export function entryTitle(entry: LibraryEntry) {
   if (entry.kind === 'clip' && entry.group) return collectionTitle(entry.group)
+  if (entry.kind === 'track' && entry.track) return entry.track.name
   if (entry.stillGroup) return stillCollectionTitle(entry.stillGroup)
   return entry.name
 }
@@ -256,6 +280,9 @@ export function entrySearchText(entry: LibraryEntry) {
   if (entry.kind === 'clip' && entry.group) {
     return entry.group.parts.map(part => `${part.name || ''} ${part.prompt || ''}`).join(' ')
   }
+  if (entry.kind === 'track' && entry.track) {
+    return `${entry.track.name || ''} ${entry.track.tags || ''} ${entry.track.lyrics || ''}`
+  }
   if (entry.stillGroup) {
     return entry.stillGroup.parts.map(part => `${part.name || ''} ${part.prompt || ''} ${part.filename || ''}`).join(' ')
   }
@@ -297,6 +324,7 @@ function compareName(a: string, b: string) {
 export function buildLibraryEntries(opts: {
   clips: LibraryClip[]
   stills: LibraryStill[]
+  tracks?: LibraryTrack[]
   folderId: string
   filter: LibraryFilter
   search: string
@@ -305,7 +333,8 @@ export function buildLibraryEntries(opts: {
   const inFolder = (folderId: string) => !opts.folderId || opts.folderId === 'all' || folderId === opts.folderId
   const clips = opts.clips.filter(clip => inFolder(clip.folderId) && clip.hasVideo !== false)
   const stills = opts.stills.filter(still => inFolder(still.folderId) && still.role === 'output')
-  const videos: LibraryEntry[] = opts.filter === 'images'
+  const tracks = (opts.tracks || []).filter(track => inFolder(track.folderId) && track.hasAudio !== false)
+  const videos: LibraryEntry[] = opts.filter === 'images' || opts.filter === 'music'
     ? []
     : groupClips(clips).map(group => ({
       kind: 'clip' as const,
@@ -314,7 +343,7 @@ export function buildLibraryEntries(opts: {
       name: collectionTitle(group),
       group
     }))
-  const images: LibraryEntry[] = opts.filter === 'videos'
+  const images: LibraryEntry[] = opts.filter === 'videos' || opts.filter === 'music'
     ? []
     : groupStills(stills).map(group => ({
       kind: 'still' as const,
@@ -323,7 +352,16 @@ export function buildLibraryEntries(opts: {
       name: stillCollectionTitle(group),
       stillGroup: group
     }))
-  let entries = [...videos, ...images]
+  const music: LibraryEntry[] = opts.filter === 'images' || opts.filter === 'videos'
+    ? []
+    : tracks.map(track => ({
+      kind: 'track' as const,
+      key: `track:${track.id}`,
+      createdAt: track.createdAt,
+      name: track.name,
+      track
+    }))
+  let entries = [...videos, ...images, ...music]
   const needle = opts.search.trim().toLowerCase()
   if (needle) {
     entries = entries.filter(entry => entrySearchText(entry).toLowerCase().includes(needle))
@@ -334,7 +372,8 @@ export function buildLibraryEntries(opts: {
     if (sort === 'name-desc') return compareName(b.name, a.name) || b.createdAt - a.createdAt
     if (sort === 'date-asc') return a.createdAt - b.createdAt
     if (sort === 'type') {
-      if (a.kind !== b.kind) return a.kind === 'still' ? -1 : 1
+      const order = { still: 0, clip: 1, track: 2 } as const
+      if (a.kind !== b.kind) return order[a.kind] - order[b.kind]
       return b.createdAt - a.createdAt
     }
     return b.createdAt - a.createdAt
@@ -342,13 +381,15 @@ export function buildLibraryEntries(opts: {
   return entries
 }
 
-export function folderOutputCount(folder: LibraryFolder, clips: LibraryClip[], stills: LibraryStill[], filter: LibraryFilter) {
-  if (!folder.unlocked) return (folder.clipCount || 0) + (folder.imageCount || 0)
+export function folderOutputCount(folder: LibraryFolder, clips: LibraryClip[], stills: LibraryStill[], filter: LibraryFilter, tracks: LibraryTrack[] = []) {
+  if (!folder.unlocked) return (folder.clipCount || 0) + (folder.imageCount || 0) + (folder.trackCount || 0)
   const videos = clips.filter(clip => clip.folderId === folder.id).length
   const images = stills.filter(still => still.folderId === folder.id && still.role === 'output').length
+  const music = tracks.filter(track => track.folderId === folder.id).length
   if (filter === 'videos') return videos
   if (filter === 'images') return images
-  return videos + images
+  if (filter === 'music') return music
+  return videos + images + music
 }
 
 export function formatWhen(createdAt: number) {
diff --git a/utils/libraryGeneration.ts b/utils/libraryGeneration.ts
index 80f7001..62f5b65 100644
--- a/utils/libraryGeneration.ts
+++ b/utils/libraryGeneration.ts
@@ -280,3 +280,34 @@ export function clipSettingsRows(clip: {
   if (loras) rows.push({ label: 'LoRA', value: loras })
   return rows
 }
+
+export function trackSettingsRows(track: {
+  tags?: string
+  lyrics?: string
+  duration?: number
+  steps?: number
+  seed?: number
+  cfg?: number
+  instrumental?: boolean
+  engine?: string
+  samplerName?: string
+  scheduler?: string
+  lyricsStrength?: number
+}) {
+  const rows: SettingsRow[] = []
+  if (track.engine) rows.push({ label: 'Engine', value: track.engine === 'ace-step-1.5' ? 'ACE-Step 1.5' : 'ACE-Step' })
+  if (track.tags?.trim()) rows.push({ label: 'Tags', value: track.tags.trim() })
+  if (track.instrumental) rows.push({ label: 'Instrumental', value: 'On' })
+  else if (track.lyrics?.trim()) rows.push({ label: 'Lyrics', value: track.lyrics.trim() })
+  if (typeof track.duration === 'number' && track.duration > 0) {
+    const rounded = Math.round(track.duration * 10) / 10
+    rows.push({ label: 'Duration', value: Number.isInteger(rounded) ? `${rounded}s` : `${rounded.toFixed(1)}s` })
+  }
+  if (track.steps != null) rows.push({ label: 'Steps', value: String(track.steps) })
+  if (track.cfg != null) rows.push({ label: 'CFG', value: formatNum(track.cfg) })
+  if (track.samplerName) rows.push({ label: 'Sampler', value: track.samplerName })
+  if (track.scheduler) rows.push({ label: 'Scheduler', value: track.scheduler })
+  if (track.lyricsStrength != null) rows.push({ label: 'Lyric strength', value: formatNum(track.lyricsStrength) })
+  if (track.seed != null) rows.push({ label: 'Seed', value: String(track.seed) })
+  return rows
+}
diff --git a/utils/music.ts b/utils/music.ts
new file mode 100644
index 0000000..6dbdf20
--- /dev/null
+++ b/utils/music.ts
@@ -0,0 +1,95 @@
+export const MUSIC_DURATION_MIN = 30
+export const MUSIC_DURATION_MAX = 180
+export const MUSIC_DURATION_DEFAULT = 60
+export const MUSIC_STEPS_MIN = 8
+export const MUSIC_STEPS_MAX = 100
+export const MUSIC_STEPS_DEFAULT = 50
+export const MUSIC_CFG_DEFAULT = 5
+export const MUSIC_LYRICS_STRENGTH_DEFAULT = 0.9
+export const MUSIC_TAGS_MAX = 2000
+export const MUSIC_LYRICS_MAX = 8000
+
+export const MUSIC_STRUCTURE_CHIPS = [
+  '[Verse 1]',
+  '[Verse 2]',
+  '[Pre-Chorus]',
+  '[Chorus]',
+  '[Bridge]',
+  '[Guitar Solo]',
+  '[Instrumental]',
+  '[Outro]'
+] as const
+
+export const DEFAULT_MUSIC_TAGS = 'modern synthpop, 120 bpm, female vocals, punchy bass, analog synths'
+
+export const DEFAULT_MUSIC_LYRICS = `[Verse 1]
+
+[Chorus]
+
+[Guitar Solo]
+
+[Outro]
+`
+
+export type MusicEngine = 'ace-step' | 'ace-step-1.5'
+
+export function parseMusicEngine(raw: unknown): MusicEngine {
+  const value = String(raw || '').trim().toLowerCase()
+  if (value === 'ace-step-1.5' || value === 'ace15' || value === 'v1.5') return 'ace-step-1.5'
+  return 'ace-step'
+}
+
+export function clampMusicDuration(raw: unknown, fallback = MUSIC_DURATION_DEFAULT) {
+  const value = Number(raw)
+  if (!Number.isFinite(value)) return fallback
+  return Math.min(MUSIC_DURATION_MAX, Math.max(MUSIC_DURATION_MIN, Math.round(value)))
+}
+
+export function clampMusicSteps(raw: unknown, fallback = MUSIC_STEPS_DEFAULT) {
+  const value = Number(raw)
+  if (!Number.isFinite(value)) return fallback
+  return Math.min(MUSIC_STEPS_MAX, Math.max(MUSIC_STEPS_MIN, Math.round(value)))
+}
+
+export function clampMusicCfg(raw: unknown, fallback = MUSIC_CFG_DEFAULT) {
+  const value = Number(raw)
+  if (!Number.isFinite(value)) return fallback
+  return Math.min(15, Math.max(1, Math.round(value * 10) / 10))
+}
+
+export function clampLyricsStrength(raw: unknown, fallback = MUSIC_LYRICS_STRENGTH_DEFAULT) {
+  const value = Number(raw)
+  if (!Number.isFinite(value)) return fallback
+  return Math.min(2, Math.max(0, Math.round(value * 100) / 100))
+}
+
+export function sanitizeMusicTags(raw: unknown) {
+  return String(raw || '').replace(/\r\n/g, '\n').trim().slice(0, MUSIC_TAGS_MAX)
+}
+
+export function sanitizeMusicLyrics(raw: unknown, instrumental = false) {
+  if (instrumental) return ''
+  return String(raw || '').replace(/\r\n/g, '\n').trim().slice(0, MUSIC_LYRICS_MAX)
+}
+
+export function parseMusicSeed(raw: unknown) {
+  const text = String(raw ?? '').trim().toLowerCase()
+  if (!text || text === 'random') return Math.floor(Math.random() * 2_147_483_647)
+  const value = Number(text)
+  if (!Number.isFinite(value)) return Math.floor(Math.random() * 2_147_483_647)
+  return Math.max(0, Math.min(2_147_483_647, Math.floor(value)))
+}
+
+export function musicContentType(ext: string) {
+  const kind = String(ext || '').replace(/^\./, '').toLowerCase()
+  if (kind === 'wav') return 'audio/wav'
+  if (kind === 'flac') return 'audio/flac'
+  if (kind === 'mp3') return 'audio/mpeg'
+  if (kind === 'ogg' || kind === 'opus') return 'audio/ogg'
+  return 'application/octet-stream'
+}
+
+export function musicExtension(filename: string) {
+  const match = String(filename || '').toLowerCase().match(/\.(wav|flac|mp3|ogg|opus)$/)
+  return match ? match[1] : 'flac'
+}
diff --git a/utils/outputNames.ts b/utils/outputNames.ts
index a60157f..3b1cf7d 100644
--- a/utils/outputNames.ts
+++ b/utils/outputNames.ts
@@ -77,6 +77,9 @@ export function engineFilenameKey(engine: string) {
   if (value === 'klein') return 'klein'
   if (value === 'ltx') return 'ltx'
   if (value === 'minimax') return 'minimax'
+  if (value === 'ace' || value === 'ace-step') return 'ace'
+  if (value === 'ace15' || value === 'ace-step-1.5') return 'ace15'
+  if (value === 'yue') return 'yue'
   return sanitizeFilenameKey(value, 16) || 'gen'
 }