MIDI Notes Player – Play any MIDI note sequence in the browser

Show HN: MIDI Notes Player – Play any MIDI note sequence in the browser

MIDI Notes Player – Play any MIDI note sequence in the browser operates in show hn launch.

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I one-shotted this app with Claude Opus 4.6 (Claude Code in VS Code), from idea to deployed GitHub Pages site in a single prompt.Live demo: https://mayerwin.github.io/MIDI-Notes-Player/It's a simple tool: paste a sequence of MIDI note numbers (like 60, 64, 67, 72) or note names (C4 E4 G4 C5) and hit Play. It also supports solfège (do ré mi fa sol), accidentals (Eb5, sol#4), any separator you want, and 50+ General MIDI instruments via SoundFont samples.Für Elise is pre-loaded so you can try it immediately.What Claude generated in one shot:- Vite + vanilla JS app (no framework)- Note parser supporting MIDI numbers, scientific pitch notation, and solfège (with French accidentals like solb, sold

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Website: mayerwin.github.io/MIDI-Notes-Player