Practice client

The client is where you actually play. It renders the score as a waterfall over a real piano keyboard, listens to your keyboard or MIDI piano, and judges every note against the score — with a timing budget that targets 240 Hz screens.

What it does

• Frame-rate independent judging, so a slow frame never costs you a note
• Latency calibration built in (the web player does not have it yet)
• Practice controls: speed, count-in, metronome, A-B loop
• Hands and fingering drawn on the falling notes
• Exports two-hand MIDI and a fingering health report
• English and Chinese, switchable without restarting