Pianolyze
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…
Pianolyze launched on November 3, 2025 with 149 votes, #193 of 9,796 launches that month and more than 95% of that year's launches. The site was not reachable when checked in September 2026.
What it does
Pianolyze transcribes piano recordings using AI that runs entirely in your browser. Drag and drop any MP3, WAV, FLAC, or M4A file and watch as the notes appear in real-time on a piano roll. Slow down playback to study difficult passages, zoom in to see exactly what's being played, and explore the harmonic choices of your favorite pianists. Perfect for jazz students, classical pianists, and anyone curious about music.
In the maker’s words, at launch
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…
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