BookatlasPiano Rabbit Hole: Improvisation Theory & Practice
9848 / 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 →

81.58Polychord → new key

This is powerful.

Old key remains below.

New key appears above.

Then lower layer disappears.

Now the upper key wins.

A modulation can occur by layer replacement.