Triads · A# root / B♭
A# / B♭
The brightest, most stable triad. The foundation of Western tonal music.
Notes in A#
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#, A#m, A#7, or another quality — the hardest and most useful ear training skill.
Major in All 12 Keys
Other Chords in A#
Related Triads
About the A# Chord
The A# chord is a major chord built on A# (also written B♭). It contains the notes Bb, D, F — the root, third, and fifth.
The brightest, most stable triad. The foundation of Western tonal music. Practising the A# 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.