BookatlasPiano Rabbit Hole: Improvisation Theory & Practice
9795 / 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 →

81.5First principle

Polychordal perception depends not only on pitch content, but on register, rhythm, articulation, and independence of the layers.

The same six notes can be heard as:

one extended chord

or:

two simultaneous chords.