Major seventh flat five chord
| Component intervals from root | |
|---|---|
| major seventh | |
| diminished fifth (tritone) | |
| major third | |
| root |
In music theory, the major seventh flat five chord is a seventh chord composed of a root note, together with a major third, a diminished fifth, and a major seventh above the root (1, ♮3, ♭5 and ♮7). For example, the dominant seventh flat five chord built on C, commonly written as C{M7♭5 or CΔ♭5, is composed of the pitches C–E–G♭–B:
- <score vorbis="1" lang="lilypond">
{ \override Score.TimeSignature #'stencil = ##f \relative c' {
\clef treble \time 4/4 \key c \major <c e ges b>1
} } </score>
The chord can be represented by the integer notation {0, 4, 6, 11}.
In jazz harmony, the major seventh flat five may be considered an altered chord, created by lowering the fifth of a major seventh chord.
Major seventh flat five chord table
Chord Root Major third Diminished fifth Major seventh CΔ♭5 C E G♭ B C♯Δ♭5 C♯ E♯ (F) G B♯ (C) D♭Δ♭5 D♭ F Adouble flat (G) C DΔ♭5 D F♯ A♭ C♯ D♯Δ♭5 D♯ F 
(G)
A C (D)
E♭Δ♭5 E♭ G Bdouble flat (A) D EΔ♭5 E G♯ B♭ D♯ FΔ♭5 F A C♭ (B) E F♯Δ♭5 F♯ A♯ C E♯ (F) G♭Δ♭5 G♭ B♭ Ddouble flat (C) F GΔ♭5 G B D♭ F♯ G♯Δ♭5 G♯ B♯ (C) D F (G)
A♭Δ♭5 A♭ C Edouble flat (D) G AΔ♭5 A C♯ E♭ G♯ A♯Δ♭5 A♯ C (D)
E G (A)
B♭Δ♭5 B♭ D F♭ (E) A BΔ♭5 B D♯ F A♯
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