Camera off — a virtual keyboard will be drawn here instead.
Enable the camera in Setup to play over your real keys.

Calibrate: drag the left dot onto the center of your lowest C key and the right dot onto your highest C key in the video. Any note label can also be dragged onto its exact key, and the two side dots move whole label rows. Press keys on your piano — a flash should appear on the key you pressed.

Tip: keep the camera still after calibrating.

Brightness Contrast

Reads the white-key gaps in the video to fit the gold dots and every label — no dragging. Run after Flatten, with your hands off the keys.

Key top Key bottom Black depth

⟲ 5s

Missed — try that part again

EMBERKEYS

Falling notes over your real piano. Hit them when they touch the fire line — miss, and the song rewinds 5 seconds.

1 · Camera (the live stage)

Key labels — print note names on the keys in the video

Camera press glow — Silent practice: the camera lights a key blue when it sees it pressed down (hovering doesn’t count). Experimental, display-only — never scored.

2 · Note input (how Emberkeys hears you)

3 · Song

4 · Difficulty

Speed80%

Timing window±300ms

Strict mode — wrong notes also rewind

Guide tones — softly play each note as it lands

Hand guide — finger numbers on the keys while you get set, and during the countdown

Speaker piano — every key you press sounds through the computer speakers. Perfect with the keyboard's volume at 0: silent keys, USB MIDI still works.

Best in Chrome or Edge on a computer, opened as a local file. Web MIDI is not available in Safari or inside sandboxed previews.

EMBERKEYS

Song complete