9817 / 18210 · Workshop 81 — Polychords and Bitonal Hearing: Two Harmonic Worlds at Once, Upper Structure vs. True Polychord, Controlled Clashes, and Making “Wrong” Chords Sound Intentional← prev⊞ allnext →
81.27Level 9 — same upper triad, different bass
RH D♭ major:
D♭-F-A♭.
Bass:
C: ♭9,11,♭13.
B♭: ♭3,5,♭7 = B♭m7-type.
G: ♭5,♭7,♭9-ish dominant tension.
D♭: ordinary D♭ major.
The upper chord's identity is stable.
Its harmonic meaning changes through bass.