Originally composed for two pianos, Piano Phase takes two identical lines of music (a 
note cell) played in synch and gradually moves them out of phase as one pianist begins to 
at a slightly faster tempo than the other.

e|-------------------------|
B|-----0-2-3-----2-0---3-2-|
G|-------------------------|
D|-2-4-------4-2-----4-----|
A|-------------------------|
E|-------------------------|

Ad infinitum.