Bb Major Seventh Sharp Fifth (Bbmaj7(#5)) chords on guitar

To play Bbmaj7#5, the Bb major seventh sharp five chord, you need Bb, D, F# and A, the root, major third, raised fifth and major seventh. The augmented triad underneath is symmetrical, so its three notes divide the octave into three equal parts. With a major seventh it does not carry the pull of a dominant seventh chord, and the colour is floating rather than tense.

Every note of Bbmaj7#5 sits inside the Bb Lydian augmented scale, so that scale is the natural place to look for melody notes. The Ionian #5 scale is the major scale with a raised fifth, the one note that separates it from a plain major scale.

Bb major 7th with sharp 5th guitar chord is also written as Bbmaj7(#5), Bbmaj7#5, BbM7(#5) or BbΔ7(#5).

Notes that compose the Bb maj7(#5) chord:

Bb D F# A

Chord Structure:

Formula: 1 3 #5 7

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Created by

Giancarlo Facoetti

Giancarlo is a musician (teaching guitar since 2000), software engineer, AI consultant and published researcher

FAQ

What notes make up Bbmaj7#5?

Bbmaj7#5 is spelled Bb, D, F# and A. That gives a root, a major third, a raised fifth and a major seventh. The F# replaces the F of an ordinary major seventh chord.

How is Bbmaj7#5 different from Bbmaj7?

Bbmaj7 has the perfect fifth F. Bbmaj7#5 raises it a semitone to F#. The other three notes, Bb, D and A, stay exactly as they were.

Is Bbmaj7#5 the same chord as A#maj7#5?

Yes. A#maj7#5 uses the same pitches, spelled A#, C##, E## and G##. Bbmaj7#5 is the readable version and has no double sharps.

Which scale covers Bbmaj7#5?

The Bb Lydian Augmented Scale (Bb, C, D, E, F#, G, A) holds all four notes. The chord takes its 1st, 3rd, 5th and 7th degrees.