9840 / 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 →
81.50Same notes, different conceptual emphasis
If you hear:
9-♯11-13 over C,
that's upper-structure thinking.
If you hear:
D-major melodic world over C-major foundation,
that's bitonal thinking.
Pitch content can be identical.
Mental organization changes the phrasing.