VoicingLab

Add this to your Claude Desktop configuration file (claude_desktop_config.json):

{ "mcpServers": { "voicinglab": { "type": "streamable-http", "url": "https://voicinglab.com/api/mcp" } } }

Restart Claude Desktop and the VoicingLab tools will appear in your tool list. Works with Claude Desktop, Claude.ai, and any MCP-compatible client.

Look up voicings for any chord symbol. Supports 468 chords across 16 voicing styles. Filter by style (shell, rootless, drop 2, quartal, etc).

{ "chordSymbol": "Cmaj7", "style": "shell" }

Get voice-led voicings for a chord progression. The algorithm minimises hand movement between chords for smooth transitions.

{ "chords": ["Dm7", "G7", "Cmaj7"], "style": "rootless" }

List all 16 voicing styles with difficulty ratings, descriptions, prerequisites, and learning order. No parameters needed.

Get personalised recommendations for what voicing style to learn next based on practice history and accuracy data.

{ "practiceHistory": [{ "style": "shell", "chordSymbol": "Cmaj7", "accuracy": 92 }] }

Get detailed chord information: quality, intervals, available voicing styles, and difficulty-appropriate style suggestions.

{ "chordSymbol": "Cmaj7" }

After adding the MCP server to Claude Desktop, try asking:

- “What are the shell voicings for Cmaj7?”
- “Voice-lead a ii-V-I in C with rootless voicings”
- “What voicing style should a beginner start with?”
- “Show me the smoothest way to play Dm7 - G7 - Cmaj7 - Fmaj7”

- Flat notation always: Eb, Bb, Ab -- never D#, A#, or G#
- F# is used only for minor-quality chords (F#m7, F#m). Major and dominant chords use Gb (Gbmaj7, Gb7).
- Jazz chord symbols: C+ (not Caug), Cm(maj7) (not CmMaj7)
- The server suggests corrections for non-standard chord spellings

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