voicemeeter-mcp

An MCP (Model Context Protocol) server for controlling Voicemeeter (Basic, Banana, or Potato) on Windows: strip and bus gains, mutes, output routing, live levels, macro buttons, presets, and audio-engine restarts.

Uses the official Voicemeeter Remote API (via voicemeeter-api).
Windows-only, local-only — the Remote API is an in-process DLL, so this server must run on the PC where Voicemeeter runs. From another machine, connect over SSH stdio (example below).
Every mutating tool accepts dry_run=true and returns a preview instead of acting.

Quick start (on the Voicemeeter PC)

# select your edition: basic | banana | potato   (default: banana)
set VM_MCP_KIND=banana

claude mcp add voicemeeter -s user -- uvx voicemeeter-mcp

From a different machine (SSH stdio):

claude mcp add voicemeeter -s user -- ssh streampc "uvx voicemeeter-mcp"

Tools

Tool	Purpose
`mixer_state`	full snapshot: every strip/bus with label, gain, mute, routing
`set_strip_gain` / `mute_strip`	input fader control
`set_strip_routing`	send a strip to A1/A2/A3/B1/B2 outputs
`set_bus_gain` / `mute_bus`	output control
`get_levels`	live post-fader levels — find silent or clipping paths
`trigger_macro_button`	press a Voicemeeter macro button
`load_preset`	load a settings XML
`restart_audio_engine`	the classic crackle fix
`health_check`	connection + version

A typical agent ask: "the game audio is too loud on stream" → mixer_state to find the strip by label → set_strip_gain(strip, -12).

Development

pip install -e '.[dev]'
ruff check src tests && pytest

Tests run anywhere (fake Remote API); only live use requires Windows.

License

MIT

Development Status
- 4 - Beta
Operating System
- Microsoft :: Windows
Programming Language

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