Finger Positions

A#m7#5/B diagram
Root Note A#
Name A# over B
Intervals 1P-3m-6m-7m
Relative Minor Gm
Notes B, A#, C#, F#, G#
Aliases A#m7#5

How to play the A#m7#5/B Chord

The A#m7#5/B is a fundamental dominant chord in guitar music. To play this chord correctly, ensure your fingers are placed precisely on the frets indicated in the diagram above.

Music Theory Analysis

From a theoretical perspective, the A# over B is built using the 1P, 3m, 6m, 7m intervals. In the key of A# Major, this chord functions as the I chord.

Common Progressions

In music composition, the A#m7#5/B chord is often used to create tension or resolution.

I-V-vi-IV

A# → F → Gm → D#

vi-IV-I-V

Gm → D# → A# → F

The Diatonic Family

Understanding the "family" of chords that belong to A# helps with transposition and ear training.

Triads

A# Cm Dm D# F Gm Adim

7ths

A#maj7 Cm7 Dm7 D#maj7 F7 Gm7 Am7b5

Scale Compatibility

View All Scales
Minor Phrygian Locrian Malkos Raga Altered Locrian #2 Spanish Heptatonic Bebop Locrian Minor Bebop Messiaen's Mode #3 Chromatic

* 11 scales found containing the notes B, A#, C#, F#, G#.

Acoustic & Digital Analysis

Digital footprint of the A#m7#5/B chord for MIDI programming and synthesizer sound design.

MIDI Numbers 71, 70, 61, 66, 68
Frequencies (Hz)

493.8833012561241, 466.1637615180899, 277.1826309768721, 369.9944227116344, 415.3046975799451