Harmonic Analyzer

What it does

Based on groundbreaking research by Bytedance, Harmonic Analyzer uses a machine learning model trained by ingesting over 200 hours of solo piano recordings to accurately transcribe the notes in a piano performance.

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  PianolyzeNov 2025 · pianolyze.com · ▲149

  Hey HN, I'm a pianist who's always been obsessed with understanding how great players think through harmony. What voicings are they using? How do they voice lead through changes? What's actually happening under their hands? Back in 2022, I built Harmonic Analyzer (https://www.youtube.com/watch?v=iNgSgvUmiOs) – a Mac app that used ML to transcribe polyphonic piano recordings. It got some traction, but I never quite finished it. Requiring users to download a Mac app felt like unnecessary friction, and I didn’t want to limit distribution to Mac users. I just shipped Pianolyze…

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