Spectrum

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Spectrum is a Audio Mixer & Router for macOS. Mix, route, and process audio from multiple sources to any output device with a visual graph-based interface.

When paired with Prism (a virtual audio splitter), Spectrum lets you capture per-application audio and route it independently — perfect for streaming, recording, or complex monitoring setups.

What Can Spectrum Do?

• Visual Audio Routing: Connect any input to any output with a node-based graph
• Per-Application Control: Route Discord, Spotify, game audio, etc. to different outputs (requires Prism)
• Real-time Mixing: Adjust levels, mute channels, and see live audio meters
• AudioUnit Effects: Add reverb, EQ, compression, and other AU plugins to any bus
• Multi-Device Output: Send audio to headphones, speakers, and recording software simultaneously

Prerequisites

• macOS (10.15 or later)
• Xcode Command Line Tools: xcode-select --install

Quick Start

For Users

1. Download Spectrum (or build from source — see Development section below)

2. Install Prism (optional, for per-app audio routing):

   cd prism
   cargo install --path .
   ./build_driver.sh
   sudo ./install.sh
   # Reboot macOS

3. Start Prism daemon (if using Prism):

   prismd --daemonize

4. Launch Spectrum and start routing audio!

Development

Repository Structure

• src/ — Frontend (React UI)
• src-tauri/ — Backend (Rust / Tauri)
• docs/ — v2 architecture & improvement plans

Setup

Prerequisites:

• Node.js and pnpm
• Rust toolchain (follows rust-toolchain.toml)

Using Nix (Optional):

nix develop

Running

1. Install Dependencies

   pnpm install

2. Run Frontend Only (UI dev server)

   pnpm dev

   • Vite dev server: http://localhost:1420

3. Run Desktop App (Tauri)

   pnpm tauri dev

   Automatically starts both UI and backend

Building

pnpm build
pnpm tauri build

Documentation

• Documentation Index: docs/README.md
• v2 Architecture (Essential Reading): docs/architecture-v2.md
• Improvement Plans (Performance/Lock-free, etc.): docs/improvements.md

About Prism

Prism is a macOS virtual audio splitter that assigns per-application audio to a 64-channel bus. Spectrum acts as the mixer/router, taking those channels as input sources and routing them to output devices.

For Prism build/install/usage instructions: see prism/README.md

License

Spectrum is licensed under the MIT License.