BookatlasPiano Rabbit Hole: Improvisation Theory & Practice
9810 / 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 →

81.20Use it as an event

C major established.

Brief F♯ major upper hit.

Return C.

The contrast creates:

outside → inside.

This is closely related to side-slipping, but the displaced material is chordal and independently recognizable.