Contrapunk – Real-time counterpoint harmony from guitar input
Hi HN, I built Contrapunk because I wanted to play guitar and hear counterpoint harmonies generated in real-time. It takes audio from your guitar, MIDI player or your computer keyboard and generates harmony voices that follow counterpoint rules to generate harmonies. You can choose the key you would like to improvise/play in and the voice leading style and which part of the harmony you would like to play as, as well. macOS DMG: https://github.com/contrapunk-audio/contrapunk/releases/tag/... Source:…
In plain words
Contrapunk is a macOS audio tool that generates real-time counterpoint harmonies from guitar, MIDI, or keyboard input. It analyzes incoming audio and creates harmony voices that follow classical counterpoint rules, allowing users to select the key, voice-leading style, and which harmony part they want to play. The software is designed for musicians who want to improvise or compose with automatic harmonic accompaniment based on their input.
written from the facts on this page · September 2026
From the sources
In the maker’s words, at launch
Hi HN, I built Contrapunk because I wanted to play guitar and hear counterpoint harmonies generated in real-time. It takes audio from your guitar, MIDI player or your computer keyboard and generates harmony voices that follow counterpoint rules to generate harmonies. You can choose the key you would like to improvise/play in and the voice leading style and which part of the harmony you would like to play as, as well. macOS DMG: https://github.com/contrapunk-audio/contrapunk/releases/tag/... Source: https://github.com/contrapunk-audio/contrapunk (do open any issues if you have any) Would love feedback on the DSP approach and the harmony algorithms. I am also looking at training a ML model for better realtime guitar to midi detection. I believe that will take some time.
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