# Music Master

> Run a mastering pass (LUFS loudness normalization + peak limiting) on an existing production

- Skill: `ruvnet/music-master` (Agent Skill)
- Install (CLI): `npx skillmds@latest add ruvnet/music-master`
- Raw SKILL.md: https://api.skillmd.com/api/skills/ruvnet/music-master/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: ruvnet (https://skillmd.com/u/ruvnet)
- Updated: 2026-09-09
- Page: https://skillmd.com/skills/ruvnet/music-master

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# Music Master

Applies loudness normalization (default target -14 LUFS, common streaming-platform standard) plus a peak limiter to an already-generated production.

## When to use

The user wants a "radio-ready" or streaming-normalized version of a track they've already generated.

## Steps

1. Call `mcp__cogmusic__master({ id: "<production-id>" })`.
2. The result includes `lufs_before` and `lufs_after` — report both so the user can see the actual loudness change, not just "done."
3. Update the cached entry in `music-productions` (if one exists) with the new `lufs_before`/`lufs_after`/`has_mastered: true` fields so later lookups don't need a round-trip.
4. Mastered audio isn't returned inline over MCP — point the user at the dashboard. See [ADR-0001](../../docs/adrs/0001-music-contract.md).