/claude-music-generate

name: claude-music-generate
description: >
  Generates music from text descriptions and lyrics using ACE-Step 1.5's Python API.
  Creates full songs with vocals, instrumentals, or both. Supports 50+ languages,
  10-600 second duration, quality presets (draft/standard/high/max), and batch generation.
when_to_use: >
  Use when the user asks to generate music, make a song, create a track,
  do text-to-music, or produce new music from scratch.
allowed-tools:
  - Bash
  - Read
  - Write

claude-music-generate — Text-to-Music Generation

Worked example (input → command → output)

**User**: "Generate a 30-second upbeat pop instrumental I can loop"

**Command**:

bash ~/.claude/skills/claude-music/scripts/music_engine.sh \
  --quality standard \
  generate \
  --caption "upbeat pop, catchy, synth hooks, female vocal" \
  --instrumental --duration 30 --language en

**Expected JSON on stdout**:

{
  "success": true,
  "task_type": "text2music",
  "model": "acestep-v15-turbo",
  "outputs": [
    {"path": "/home/$USER/Music/claude-music-output/text2music_20260416_120512_01.flac",
     "seed": 137294, "size_mb": 1.83, "index": 1},
    {"path": "/home/$USER/Music/claude-music-output/text2music_20260416_120512_02.flac",
     "seed": 837412, "size_mb": 1.80, "index": 2}
  ],
  "timing": {"generation_sec": 18.3},
  "count": 2,
  "playback_hint": "ffplay -nodisp -autoexit \"/home/$USER/Music/claude-music-output/text2music_20260416_120512_01.flac\""
}

Global flags (`--quality`, `--format`, `--seed`, etc.) go BEFORE the subcommand (`generate`). Subcommand flags (`--caption`, `--duration`, etc.) go AFTER.

Pre-Flight

1. Run `bash ~/.claude/skills/claude-music/scripts/preflight.sh "" "$OUTPUT"` if output specified 2. Run `bash ~/.claude/skills/claude-music/scripts/detect_gpu.sh` to determine quality tier

Basic Generation

# Simple instrumental
bash ~/.claude/skills/claude-music/scripts/music_engine.sh generate \
  --caption "upbeat electronic dance music, energetic synths, driving beat" \
  --instrumental --duration 60

# Song with lyrics
bash ~/.claude/skills/claude-music/scripts/music_engine.sh generate \
  --caption "pop ballad, female vocal, piano, emotional" \
  --lyrics "[Verse 1]
Under city lights we found our way
Every word you said still haunts my day
[Chorus]
Hold me close don't let me fall
You're the only one who hears my call" \
  --duration 120 --language en

# High quality with thinking mode
bash ~/.claude/skills/claude-music/scripts/music_engine.sh generate \
  --caption "jazz fusion, saxophone, complex harmony" \
  --quality high --duration 180 --bpm 110 --key "Bb major"

# Quick draft — 4 variants to pick from
bash ~/.claude/skills/claude-music/scripts/music_engine.sh generate \
  --caption "lo-fi hip-hop, chill, atmospheric, vinyl crackle" \
  --quality draft --instrumental --duration 60

Parameters

| Parameter | Flag | Default | Range | Description | |-----------|------|---------|-------|-------------| | Caption | `--caption` / `-c` | required | <512 chars | Style/genre/instrument description | | Lyrics | `--lyrics` / `-l` | `""` | <4096 chars | Song lyrics with structure tags | | Instrumental | `--instrumental` | false | flag | No vocals | | Language | `--language` | `en` | ISO 639-1 | Vocal language (en, zh, ja, es, fr, etc.) | | Duration | `--duration` | 60 | 10-600 sec | Target length | | BPM | `--bpm` | auto | 30-300 | Tempo (auto = model decides) | | Key | `--key` | auto | e.g. "C major" | Musical key | | Time Sig | `--time-sig` | auto | 2/3/4/6 | Time signature | | Quality | `--quality` | standard | draft/standard/high/max | Preset | | Batch | `--batch` | 2 | 1-8 | Number of variants | | Format | `--format` | flac | flac/wav/mp3/opus/aac | Output format | | Seed | `--seed` | -1 | int | Reproducibility (-1 = random) | | Model | `--model` | auto | turbo/base/sft/xl-* | Override DiT model |

Quality Presets

• **draft**: turbo, steps=8, no LM, batch=4. Fastest. Use for exploring ideas.
• **standard**: turbo, steps=8, no LM, batch=2. Default. Good balance.
• **high**: turbo + 1.7B LM, thinking=True, batch=2. Better structure/lyrics adherence.
• **max**: base model, steps=65, LM thinking, batch=1. Best quality, ~3-5 min.

Output

JSON to stdout with paths, seeds, timing:

{
  "success": true,
  "task_type": "text2music",
  "outputs": [{"path": "/home/.../generate_20260416_120000_01.flac", "seed": 42}],
  "playback_hint": "ffplay -nodisp -autoexit \"/path/to/file.flac\""
}

Workflow Tips

1. **Start with draft quality** — generate 4 variants, pick the best direction 2. **Lock the seed** — once you find a good variant, use `--seed <value>` to reproduce it 3. **Iterate on caption** — add/remove descriptors to steer the sound 4. **Use compose first** — for vocal songs, use `/music compose` to craft proper lyrics before generating 5. **Repaint bad sections** — don't regenerate the whole song; use `/music repaint` to fix specific parts

Caption Crafting Quick Guide

**Formula**: `Genre + mood + instruments + vocal style + production quality`

Good: `"upbeat pop, female vocal, catchy, piano, modern production, 2020s sound"` Bad: `"a good song"` (too vague) Bad: `"ambient metal classical hip-hop"` (conflicting genres)

For detailed guidance: load `references/prompt-guide.md`

Lyrics Quick Guide

• Use structure tags: `[Verse]`, `[Chorus]`, `[Bridge]`, `[Intro]`, `[Outro]`
• Keep lines 4-8 words for best vocal clarity
• ~2-3 words per second (60s song ~ 120-180 words)
• Avoid tongue twisters and complex vocabulary

For detailed guidance: load `references/prompt-guide.md`