8266 / 18210 · Workshop 66 — Melodic Development Through Guide Tones: Making 3rds and 7ths Sing, Connecting Chords Horizontally, and Building Lines That Explain the Harmony← prev⊞ allnext →
66.35Compare with G7
G7 guide tones:
B-F.
D♭7:
C♭(B)-F.
Same tritone enharmonically.
The guide-tone core is almost identical.
The bass changes.
This is the heart of the substitution.