Return the sorted MIDI pitches for a chord (string or ChordModel) at octave.
octave
dim7 rule: Diminished triad + minor seventh → seventh offset = [9] (not [10]). Co7 → [60,63,66,69]; Ch7 → [60,63,66,70].
Return the sorted MIDI pitches for a chord (string or ChordModel) at
octave.dim7 rule: Diminished triad + minor seventh → seventh offset = [9] (not [10]). Co7 → [60,63,66,69]; Ch7 → [60,63,66,70].