MPE Keys
Christophe Kalkau · Sep 24, 2026
A real-time MIDI keyboard and piano visualizer. Every note you play appears in the colour of its own MPE channel, with pressure, pitch bend in cents and timbre drawn on the key itself. Nine designs, and live notation on a Grand Staff. No controller? Your computer keyboard plays it.
About MPE Keys
MPE Keys is a real-time tool for playing, visualizing and exploring MPE. It puts the instrument you already own on screen, key by key: every note in the colour of its own MPE channel, its pressure, its pitch bend and its timbre drawn on the key itself. It is the Keyboard, the PB / Mod display and the Grand Staff of MPE Insight, running on their own, in a window shaped for three modules instead of nine. A smaller app, not a smaller keyboard: nothing about the keyboard is cut down for this build. For the camera, the classroom and the desk. Any class-compliant MIDI device, no drivers, no plugins and no browser. An MPE controller sends its five dimensions straight away; an ordinary keyboard lights the keys it plays. A piano that shows what your hands are doing On an ordinary keyboard display a key is on or off. Under MPE a key has a life: it is held by one voice, it leans, it presses, it brightens. All four are drawn at once, on the key itself, from any MIDI keyboard you already own. It plays, too A display that can only watch is useless on a train, so both playable ways in come along and both send real MPE out of the app. Typing Keys lays two manuals under your hands on the computer k
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