A piano you can play.
Eight continuous voices. Two reusable hammers. Eight stretched partials inside each piano operator — no recorded samples in the sound engine.
Tap Enable audio, then play below or use A W S E D F T G Y H U J K.
Velocity changes the strike, spectrum, and decay. Volume only changes listening level. The octave selector shifts the keyboard without squeezing four octaves onto your phone.
The eight sustained operators
Operators 0–7 hold the notes. Operators 8–9 supply short hammer modulation, then return to their pool. A ninth note steals an existing voice. Release damps the tail rather than resetting it.
Watch the keyboard hardware
Physical key state appears here after audio starts.
256 physical keys. DOWN at 0400, PRESSED at 0420, RELEASED at 0440. A real v7 guest routine copies and acknowledges edge bits at 600 Hz; this host-side instrument driver turns them into notes.
Six recorded anchor shapes
A3 (220 Hz), A4 (440 Hz), and A5 (880 Hz), each soft and hard. Their compact envelopes, partial balance, stereo distribution, and decay are blended between anchors. Outside the measured range, the nearest anchor is transposed without exaggerating its weak partials.
16 points × 4 bits + exponential tailA new hardware iteration
Sixteen 32-byte operators; each supports eight partials, stereo weights, stiffness and fine tuning, response smoothing, and fundamental/sum feedback. Extensions can add another eight partials without another output slot.