Music Generation Skill

Overview

This skill generates songs (vocal or instrumental) from a structured JSON spec using the MiniMax music generation API (/v1/music_generation). You describe the style/mood/scene in prompt, optionally provide lyrics, and the script returns an MP3.

Workflow

Step 1: Understand Requirements

Identify the desired style, mood, scene, language, and whether the user wants vocals or a pure instrumental track. Decide whether to supply lyrics or let the model write them.

Step 2: Create the Spec JSON

Write a JSON file in /mnt/user-data/workspace/ named {descriptive-name}.json:

{
  "title": "Rainy Night Cafe",
  "prompt": "indie folk, melancholic, introspective, walking alone, cafe",
  "lyrics": "[verse]\nStreetlights glow the night wind sighs\n[chorus]\nPush the wooden door warm air inside"
}

Fields:

• title (optional): a human-readable name.
• prompt (required): style, mood, and scene. Drives the musical character.
• lyrics (optional): song lyrics. Use \n between lines and structure tags such as [Intro], [Verse], [Pre Chorus], [Chorus], [Bridge], [Outro].
• is_instrumental (optional, bool): set true for a pure instrumental track (no lyrics needed).

Behavior:

• lyrics provided → those lyrics are sung.
• is_instrumental: true → instrumental, no vocals.
• neither → the model auto-writes lyrics from prompt (lyrics_optimizer).

Step 3: Execute Generation

python /mnt/skills/public/music-generation/scripts/generate.py \
  --prompt-file /mnt/user-data/workspace/rainy-night-cafe.json \
  --output-file /mnt/user-data/outputs/rainy-night-cafe.mp3

Parameters:

• --prompt-file: Absolute path to the JSON spec (required).
• --output-file: Absolute path for the output MP3 (required).

[!NOTE] Do NOT read the python file, just call it with the parameters.

Environment

• MINIMAX_API_KEY (required): your MiniMax interface key.
• MINIMAX_API_HOST (optional): default https://api.minimaxi.com.
• MINIMAX_MUSIC_MODEL (optional): default music-2.6-free (works for all API-key users); paid/Token-Plan users can set music-2.6 for higher limits.

Output Handling

• Music is saved as MP3 (typically in /mnt/user-data/outputs/).
• Returned audio must decode to nonempty bytes and have an ID3 tag header or MPEG frame signature. This is a header sanity check, not complete audio decoding.
• Malformed, empty or unrecognized audio is rejected before creating the output directory or opening the output file; an existing output is preserved.
• Missing audio reports "MiniMax returned no audio data"; whitespace-only hex reports "MiniMax audio decoded to empty bytes".
• Share the generated file with the user using the present_files tool.
• Offer to iterate on style or lyrics if adjustments are needed.

Notes

• Keep prompt focused on style/mood/scene; put the actual sung words in lyrics.
• For non-English songs, write lyrics in the target language.