Music Generate Skill#

This skill generates music using the Volcengine Music Generation API. It supports vocal songs, instrumental BGM, and AI lyrics generation.

Trigger Conditions#

1. User wants to generate a song (with lyrics or a text prompt)
2. User needs background music, instrumental tracks, or soundtracks
3. User wants AI-generated lyrics
4. User mentions "write a song", "music generation", "BGM", "background music", "lyrics"

Environment Variables#

Before using this skill, ensure the following environment variables are set:

• VOLCENGINE_ACCESS_KEY — AccessKey ID
• VOLCENGINE_SECRET_KEY — AccessKey Secret

How to obtain: Volcengine Console → Account (top-right) → Key Management → Create Key.

Usage#

1. Determine user intent and select the mode ( song / bgm / lyrics).
2. cd to the skill directory: skills/byted-music-generate.
3. Run the script. The script polls the API internally and may take several minutes to complete (typically 1–5 minutes for song/bgm).
4. Monitor execution: If the runtime environment moves the command to background, you MUST periodically (every 10 seconds) read the terminal output to check whether the script has finished. The script prints polling progress to stderr and outputs a single JSON line to stdout upon completion.
5. Once completed, return the audio_url or lyrics from the JSON output to the user.

Three Modes#

1. song — Vocal Song#

User provides lyrics (Lyrics) or a text prompt (Prompt) to generate a vocal song.

bash

# With text prompt
python scripts/music_generate.py song --prompt "A song about summer at the beach" --genre Pop --gender Female

# With lyrics
python scripts/music_generate.py song --lyrics "[verse]\nMoonlight on the windowsill\nMemories flowing like water\n[chorus]\nYou are my moonlight" --genre Folk --mood "Sentimental/Melancholic/Lonely"

Note: --lyrics and --prompt are mutually exclusive; lyrics takes priority. If the user hasn't provided lyrics, you can first use the lyrics mode to generate them, then pass the result to the song mode.

2. bgm — Instrumental BGM#

Describe the desired music in natural language. The v5.0 model does not require Genre/Mood parameters — just describe everything in the --text field.

bash

python scripts/music_generate.py bgm --text "Relaxed coffee shop ambiance music with piano and guitar" --duration 60

# With song structure segments
python scripts/music_generate.py bgm --text "Epic game soundtrack" --segments '[{"Name":"intro","Duration":10},{"Name":"chorus","Duration":30}]'

3. lyrics — Lyrics Generation#

Returns synchronously (no polling needed). Can be used standalone or as a pre-step for the song mode.

bash

python scripts/music_generate.py lyrics --prompt "A song about graduation farewell" --genre Folk --mood "Sentimental/Melancholic/Lonely" --gender Female

Manual Task Query (timeout fallback)#

bash

python scripts/music_generate.py query --task-id "202601397834584670076931"

Mode Detection Logic#

text

User Request
    ↓
Contains "instrumental/BGM/background music/soundtrack"?
    ├─ Yes → bgm mode
    └─ No → Contains "lyrics/write lyrics" and does NOT request audio?
        ├─ Yes → lyrics mode
        └─ No → song mode
            ├─ User provided lyrics → --lyrics
            └─ User only described a theme → --prompt (or lyrics first, then song)

Script Parameters#

song mode#

ParameterRequiredDescription--lyricseitherLyrics with structure tags--prompteitherText prompt (Chinese, 5-700 chars)--model-versionnov4.0 or v4.3 (default: v4.3)--genrenoMusic genre--moodnoMusic mood--gendernoFemale / Male``--timbrenoVocal timbre--durationnoDuration in seconds [30-240]--keynoMusical key (v4.3 only)--kmodenoMajor / Minor (v4.3 only)--temponoTempo (v4.3 only)--instrumentnoInstruments, comma-separated (v4.3 only)--genre-extranoSecondary genres, comma-separated, max 2 (v4.3 only)--scenenoScene tags, comma-separated (v4.3 only)--langnoLanguage (v4.3 only)--vod-formatnowav / mp3 (v4.3 only)--billingnoprepaid / postpaid (default: postpaid)--timeoutnoMax wait seconds (default: 300)

bgm mode#

ParameterRequiredDescription--textyesNatural language description--durationnoDuration in seconds [30-120]--segmentsnoJSON array of song structure segments--versionnoModel version (default: v5.0)--enable-input-rewritenoEnable prompt rewriting--billingnoprepaid / postpaid (default: postpaid)--timeoutnoMax wait seconds (default: 300)

lyrics mode#

ParameterRequiredDescription--promptyesLyrics prompt (Chinese only, <500 chars)--genrenoMusic genre--moodnoMusic mood--gendernoFemale / Male

Script Return Info#

The script outputs JSON with the following fields:

json

{
    "status": "success | timeout | error",
    "mode": "song | bgm | lyrics | query",
    "task_id": "...",
    "audio_url": "https://...",
    "duration": 46.0,
    "lyrics": "...",
    "error": null
}

Return the audio_url to the user for download or playback. URLs are valid for approximately 1 year, but users should save the file promptly.

Error Handling#

• PermissionError: VOLCENGINE_ACCESS_KEY ...: Inform the user to configure the environment variables. Write them to the workspace environment variable file, then retry.
• status: "timeout": The task is still generating. Provide the user with the task_id and the manual query command from the output.
• Copyright check failure (code 50000001): Suggest the user enrich the description or increase the audio duration, then retry.

References#

• Available parameter values (Genre/Mood/Timbre/Instrument etc.): references/parameters.md
• Volcengine Music Generation Docs
• API Signature Guide