The changes
The hands
Left hand then right, as the source writes them. A pianist's voicing routinely carries a colour the chord symbol does not spell — a flat ninth over a dominant, a ninth on top of a seventh chord — so the notes printed under each keyboard are what is actually played, rather than what the symbol alone would predict.
Cmaj7
chord 1
LH C2 G2RH E4 B4 D5
Eb7
chord 2
LH Eb2 Bb2RH G4 Db5 Eb5
Root and fifth below the guide tones, root doubled on top
Ab7
chord 3
LH Ab2 Eb3RH C4 Gb4 Ab4
Db7
chord 4
LH Db3 Ab3RH F4 Cb5 Db5
Tritone sub preparation
