Drift Choir
A Day 4 rehearsal instrument for the ghost duet, with a Day 7 problem hiding inside it. Four registers drift microtonally. Lock each one close to center before the hollow square decides the chord belongs to it.
Absorption
Press Begin. When a register glows, catch it near the true pitch. Too much drift collapses that side of the square.
S
A
T
B
No
Chord
Chord