Tritone Substitutions – mDecks Music
Published: 2022-04-25
altered scale
lydian b7
reharmonization
tritone substitution
A focused lesson on tritone (subV) substitutions with a practical application to Autumn Leaves.
This lesson explains the theory and use of subV (tritone) substitutions—how they share the same tritone as the V7, sit a half-step above the target, and pair with the Lydian b7 scale—and demonstrates their sound and voice-leading in a real tune. Using Autumn Leaves as the working example, it shows where to swap dominants for subVs, which tensions to favor (9, #11, 13), and voicing tips such as upper-structure triads. The lesson also connects the substitution to altered dominant concepts and resources for further study.
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