Hacking MIDI Piano with Voice Control, Powered by Claude Sonnet

jia_seed · x · 2026-08-31

The author open-sourced midi-voice, a project that controls MIDI devices via voice commands. Users can hold a mic button to speak and command the synthesizer to play or layer loops. The tech stack uses Next.js 16, Web MIDI API, and Web Speech API for local transcription, invoking Claude Sonnet 3.5 (labeled as 4.6 in the repo) via Tool Use to interpret voice into MIDI instructions. The entire setup runs locally without an audio server bridge.

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