A Major seventh flat sixth

The major seventh ♭6 chord adds a lowered sixth above the root while keeping a major third and major seventh. That combination creates a bittersweet major color: still “major family” at the third and seventh, but with a shadowed upper extension that can suggest borrowed harmony or modal mixture. It is useful when you want richness without turning the chord into a dominant seventh.

Construction

Practical stack: 1-3-5-7-♭6 (the fifth may be omitted). In Cmaj7♭6, a working set is C-E-G-B-A♭. Spacing helps: the ♭6 can clash with nearby chord tones if everything is stacked tightly.

Usage

Appears in modern jazz, fusion, neo-soul, and cinematic pop as a color chord on I or IV, as a reharmonization choice, or as a passing chord between clearer major sonorities.

Examples

• Reharmonized tonic chords in jazz ballads
• Neo-soul pads that avoid plain maj7 voicings
• Film cues that need “bright but haunted” major harmony

Play

Anchor 3 and 7, place ♭6 in a distinct register, and resolve ♭6 stepwise when possible for smooth voice leading into the next chord.

Ear-training cues

Hear major seventh stability with a lowered sixth shadow above the fifth region.