← C♯ Mixolydian on Bassoon (tenor clef)
C♯ Mixolydian — Quartal voicings
Three-note stacks of fourths, one per scale degree — the open, ambiguous voicing-flavour McCoy Tyner and Bill Evans built modal-era jazz around (the 'So What' chord).
All 7 quartal voicings in sequence
Degree 1 · I(4)C#(4)
Degree 2 · II(4)D#(4)
Degree 3 · III(4)E#(4)
Degree 4 · Degree 4F♯·B·E♯
Degree 5 · V(4)G#(4)
Degree 6 · VI(4)A#(4)
Degree 7 · Degree 7B·E♯·A♯