claude-music-generate

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

Run bash ~/.claude/skills/claude-music/scripts/preflight.sh "" "$OUTPUT" if output specified
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

Start with draft quality — generate 4 variants, pick the best direction
Lock the seed — once you find a good variant, use --seed <value> to reproduce it
Iterate on caption — add/remove descriptors to steer the sound
Use compose first — for vocal songs, use /music compose to craft proper lyrics before generating
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