Web MIDI output · counter-line compiler
Answer Piano
Karel's real recording plays as the only sound. A rule-based compiler reads his chords and emits a harmonized counter-voice out through Web MIDI, so your own synth or DAW answers his piano — the counter-line is data, never sounded inside this page.
No MIDI output connected — connect a synth or DAW and your hardware will answer his piano. The dual roll below still animates the would-be counter-line as dashed ghost notes.
Chord
—
Playhead
0:00 / 0:00
Notes emitted
0
Device
—
Counter-voice — a harmony a third above his line