9978 / 18210 · Workshop 82 — Symmetrical Harmony and Harmonic Geometry: Diminished Cycles, Augmented Triads, Whole-Tone Motion, Major-Third Systems, and Escaping Ordinary Tonal Gravity← prev⊞ allnext →
82.71G7 vs D♭7 revisited
G7 guide tones:
B-F.
D♭7 guide tones:
F-C♭.
C♭ = B.
Same tritone.
Roots:
G and D♭
are also a tritone apart.
Thus tritone substitution is another form of harmonic symmetry.