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Bass Guitar Chord & Arpeggio Guide

A#/Bb Half-Diminished (m7♭5) Bass Chord

Master the A#m7♭5 chord on 4, 5, and 6-string bass with fretboard diagrams, interactive BPM looper, and TAB.

🎹 Open in Simple Learning

4-String Bass Arpeggio TAB & Notation

G|----------1--3---|
D|-------2---------|
A|-1--4------------|
E|-----------------|

Chord Tones & Degree Formula

Chord Tones: A# - C# - E - G#

A# Half-Diminished (m7♭5) is the same set of pitches as Bb Half-Diminished (m7♭5); this page spells the notes from A#.

1
A#
Interval: +0st
♭3
C#
Interval: +3st
♭5
E
Interval: +6st
♭7
G#
Interval: +10st

Interactive Fretboard Chart

Filter:

Golden badges mark the root; purple badges show active chord tones.

Nut
1
2
3
4
5
6
7
8
9
10
11
12
G
G#
A#
C#
E
D
E
G#
A#
C#
A
A#
C#
E
G#
E
E
G#
A#
C#
E

Musical Role & Bass Application

Character: Dark, modern jazz tension with leading momentum.

Bass Application: Minor key ii-V-i progressions and dark jazz cadences.

All the notes of the A# Half-Diminished (m7♭5) chord fit inside Bb Blues, A# Locrian and Bb Diminished Half-Whole; they also fit G# Natural Minor.

Check it on your own bass with the live trainer, or practise it over a ready-made line from the bass riff library with TAB and MIDI.

Frequently Asked Questions

What notes are in the A#/Bb Half-Diminished (m7♭5) bass chord?

The chord tones of the A# Half-Diminished (m7♭5) bass chord are: A# - C# - E - G#. The formula is: 1 - ♭3 - ♭5 - ♭7. A# Half-Diminished (m7♭5) is the same set of pitches as Bb Half-Diminished (m7♭5); this page spells the notes from A#.

How do bassists use Half-Diminished (m7♭5) chords in basslines?

Dark, modern jazz tension with leading momentum. Minor key ii-V-i progressions and dark jazz cadences.

How can I practice this bass chord across 4, 5, and 6 strings?

Toggle between 4-string, 5-string, and 6-string fretboards on this page, or launch Basnote Simple Learning for real-time Web MIDI input and note-role grading.