Added · A# root / B♭
A#add9 / B♭add9
A major triad with an added 9th but no 7th. Bright and open.
Notes in A#add9
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#add9, A#m, A#7, or another quality — the hardest and most useful ear training skill.
Add 9 in All 12 Keys
Other Chords in A#
Related Added
About the A#add9 Chord
The A#add9 chord is a add 9 chord built on A# (also written B♭add9). It contains the notes Bb, D, F, C — the root, third, fifth, and seventh.
A major triad with an added 9th but no 7th. Bright and open. Practising the A#add9 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.