9820 / 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 →
81.30Practical distinction
D/C
often means:
D major triad over C bass.
D major over C major
means:
one complete C-major layer plus one D-major layer.
On piano that might be:
LH: C-E-G.
RH: D-F♯-A.
Much denser.