A#°b9 Guitar Chord — Chart and Tabs in Open E flat Tuning

Short answer: A#°b9 is a A# Diminished ♭9 chord with the notes A♯, C♯, E, G, B. In Open E flat tuning, there are 24 voicings. See the fingering diagrams below.

Also known as: A# dimb9

Looking for A#°b9 (Standard Tuning)?

ChordIQFree

Ready to actually learn these chords? Train your ear, master the staff, and build real skills with interactive games — for guitar, ukulele, bass and more.

Get It Free

Piano CompanionFree★ 4.7 · 24,738 ratings

Hear this chord, see every inversion and find any chord from the notes you play — even offline. 10,000+ chords and scales, free.

Get It Free

How to Play A#°b9 on Guitar

A#^°b9, A#dim^b9

Notes: A♯, C♯, E, G, B

Quick Summary

• The A#°b9 chord contains the notes: A♯, C♯, E, G, B
• In Open E flat tuning, there are 24 voicings available
• Also written as: A# dimb9
• Each diagram shows finger positions on the Guitar fretboard

Did you know?

KidTeller

Personalized Storybooks

Your child can star in their own personalized storybook? KidTeller weaves your child's name, photo, and favorite things into a magical adventure — making them the hero of every page.

Create a Story

Did you know?

MathIt

Multiplayer Math Game

Math practice can be a multiplayer battle? MathIt lets 2–5 players compete head-to-head in fast 30-second rounds. Share a room code with friends and find out who solves equations the fastest.

Play Now

Frequently Asked Questions

What is the A#°b9 chord on Guitar?

A#°b9 is a A# Diminished ♭9 chord. It contains the notes A♯, C♯, E, G, B. On Guitar in Open E flat tuning, there are 24 ways to play this chord.

How do you play A#°b9 on Guitar?

To play A#°b9 on in Open E flat tuning, use one of the 24 voicings shown above. Each diagram shows finger positions on the fretboard, with numbers indicating which fingers to use.

What notes are in the A#°b9 chord?

The A#°b9 chord contains the notes: A♯, C♯, E, G, B.

How many ways can you play A#°b9 on Guitar?

In Open E flat tuning, there are 24 voicings for the A#°b9 chord. Each voicing uses a different position on the fretboard while playing the same notes: A♯, C♯, E, G, B.

What are other names for A#°b9?

A#°b9 is also known as A# dimb9. These are different notations for the same chord with the same notes: A♯, C♯, E, G, B.

All A# chords