Correct chord = +1. Your next chord appears automatically.
Any octave or inversion. Tracks pressed keys; ignores the sustain pedal.
Green bar = sound level. Lower the gate for a quiet keyboard. Use a clean piano tone; release between chords.
Tap Piano needs no microphone or MIDI permissions. Download this file and open it in a full browser. A chat preview or phone file preview may not run JavaScript.
For microphone / MIDI, use an HTTPS site or a local server on the same computer. API support, browser permissions and connected hardware are checked separately. Unsupported modes are disabled.
Desktop local server: put this file in a folder, open a terminal there, run python3 -m http.server 8000, then open http://localhost:8000/chord-rush-fixed.html. A phone opening your computer's plain HTTP LAN address is not a secure context; use HTTPS for phone microphone access.
Tap the notes one by one. Tap again to deselect. No need to hold three fingers at once.