Extended · A# root / B♭
A#m9 / B♭m9
Rich and soulful. A favourite in R&B and jazz voicings.
Notes in A#m9
A# / Bb is a favourite for horn players and jazz musicians. Many blues and jazz standards are in Bb.
Identify the Chord Quality on A#
Each chord below is played on A#. Listen and identify whether you heard A#m9, A#m, A#7, or another quality — the hardest and most useful ear training skill.
Minor 9th in All 12 Keys
Other Chords in A#
Related Extended
About the A#m9 Chord
The A#m9 chord is a minor 9th chord built on A# (also written B♭m9). It contains the notes Bb, Db, F, Ab, C — the root, third, fifth, seventh, and extensions.
Rich and soulful. A favourite in R&B and jazz voicings. Practising the A#m9 chord across different voicings and contexts builds the harmonic recognition that lets you identify it instantly in any musical setting — whether in a band mix, a recording, or a live performance.