Chords the Piano Seat Reads Off a Chart

Pick a letter, then whichever of 62 qualities the chart wrote after it. What comes back is the voicing plus the thing a chord chart never says: which degree this is likely to be, and therefore what the rest of the group is already covering.

The piano seat carries the whole harmony at once — a shell in the left hand, the colour tones and any substitution in the right, which is why this is the seat a substitution is usually heard from first. It is the only seat here that can state a chord and its substitute in the same beat, left hand holding one and right hand implying the other.

The diagrams are drawn across all 88 keys from A0 to C8, with the notes that sound lit and the ones a voicing drops shown dashed, so what you are looking at is a decision rather than a picture of every note in the chord.