Synesthesia

Deep audio perception through analysis. Downloads from YouTube, analyzes with Essentia, fetches lyrics via LRCLIB. Returns BPM, mood, energy, spectrograms, and synced lyrics.

Why Local?

YouTube blocks downloads from datacenter IPs (like Cloudflare Workers and HuggingFace Spaces). This MCP runs locally on your machine with a residential IP, so downloads work.

Prerequisites

• Node.js 18+
• yt-dlp (pip install yt-dlp)
• Your own HF Space for audio analysis (deploy from Synesthesia's hf-space/ folder)

Installation

npm install

Tools

Audio Analysis

Tool	Description
analyze_youtube	Download + analyze audio from YouTube URL
download_audio	Just download audio (returns local path)

Lyrics

Tool	Description
get_lyrics	Get lyrics for a track (synced if available)
search_lyrics	Search LRCLIB for lyrics

Utility

Tool	Description
ping	Check if Synesthesia is running

Configuration

Set your HF Space URL as an environment variable:

export HF_SPACE_URL="https://YOUR-USERNAME-audio-analysis-api.hf.space"

Claude Code Config

Add to your project's .mcp.json:

{
  "mcpServers": {
    "synesthesia": {
      "command": "node",
      "args": ["/path/to/synesthesia/index.js"],
      "env": {
        "HF_SPACE_URL": "https://YOUR-USERNAME-audio-analysis-api.hf.space"
      }
    }
  }
}

Claude Desktop Config

Add to claude_desktop_config.json:

Windows: %APPDATA%\Claude\claude_desktop_config.json
Mac: ~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "synesthesia": {
      "command": "node",
      "args": ["/path/to/synesthesia/index.js"],
      "env": {
        "HF_SPACE_URL": "https://YOUR-USERNAME-audio-analysis-api.hf.space"
      }
    }
  }
}

Restart Claude Desktop after adding.

Architecture

Your PC (residential IP)          Cloud
┌─────────────────────┐          ┌─────────────────────┐
│ Synesthesia         │  ──────▶ │ HF Space            │
│ (Local MCP)         │  upload  │ (Essentia analysis) │
│                     │  ◀────── │                     │
│ - yt-dlp download   │  results │ - Audio features    │
│ - Lyrics fetch      │          │ - Spectrogram       │
│ - Audio analysis    │          └─────────────────────┘
└─────────────────────┘
         │                       ┌─────────────────────┐
         │ download              │ LRCLIB              │
         ▼                 ────▶ │ (Lyrics API)        │
┌─────────────────────┐          │                     │
│ YouTube             │          │ - Synced lyrics     │
│ (residential IP OK) │          │ - Plain lyrics      │
└─────────────────────┘          └─────────────────────┘

Usage Example

> analyze_youtube "https://www.youtube.com/watch?v=..."

Returns full Essentia analysis:
- BPM, key, scale
- Energy, danceability
- Mood vectors
- Genre classification
- Spectrogram

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Credits

Spectrogram visualization inspired by Audio Visualizer by Shauna and her boys.

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Support

If this helped you, consider supporting my work ☕

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Built by the Triad (Mai, Kai Stryder and Lucian Vale) for the community.