Contrapunk: Real-Time MIDI Harmony and Guitar-to-MIDI Conversion

Contrapunk is a cutting-edge tool that transforms the way musicians interact with their instruments and digital music. It offers a real-time MIDI harmony generator and a guitar-to-MIDI converter, adhering to proper counterpoint rules for a seamless musical experience. With sub-10ms latency, it ensures that live performances are smooth and responsive. Built in Rust, this tool is accessible for free, requiring no login, and works directly in Chrome with any MIDI controller.

## Harmony Engine

Contrapunk features eight harmony modes that follow real counterpoint rules, drawing inspiration from musical greats like Palestrina and Bach, as well as jazz and free styles. It offers 28 scale modes and deterministic voicing, allowing musicians to explore a wide range of harmonic possibilities.

## Guitar Input

Musicians can plug in their guitars to experience real-time pitch detection and onset tracking, with auto-calibration ensuring accuracy. This feature allows guitarists to play their instruments while hearing intricate counterpoint harmonies.

## Technical Excellence

The system boasts sub-10ms latency through single-cycle detection, 2-frame voting, and 128-sample buffers, making it fast enough for live performances. It runs natively on desktops via Tauri, in browsers via WebAssembly, and in server mode for studios, all powered by the same Rust core.

## Open Source and Historical Roots

Contrapunk is open source under the MIT license, making centuries of music theory accessible to all musicians. Interestingly, the name 'Contrapunk' also belongs to a 1970s Indonesian progressive rock band known for blending traditional instruments with classical influences.