A#
Diatonic Scale
A# / B♭ Major
The brightest, most stable scale — the foundation of Western tonal music.
Notes in A# Major
Bb1
C2
D3
Eb4
F5
G6
A7
Bb8
Chords in A# Major
7 diatonic chordsDegreeChordNotesQuality
IBbBb – D – Fmajor
iiCmC – Eb – Gminor
iiiDmD – F – Aminor
IVEbEb – G – Bbmajor
VFF – A – Cmajor
viGmG – Bb – Dminor
viiA°A – C – Ebdiminished
Other Scales in A#
Natural MinorBb, C, Db, Eb, F, Gb, AbHarmonic MinorBb, C, Db, Eb, F, Gb, AMelodic MinorBb, C, Db, Eb, F, G, ADorianBb, C, Db, Eb, F, G, AbPhrygianBb, B, Db, Eb, F, Gb, AbLydianBb, C, D, E, F, G, AMixolydianBb, C, D, Eb, F, G, AbLocrianBb, B, Db, Eb, E, Gb, AbMajor PentatonicBb, C, D, F, GMinor PentatonicBb, Db, Eb, F, AbBluesBb, Db, Eb, E, F, AbWhole ToneBb, C, D, E, Gb, AbDiminished (H-W)Bb, B, Db, D, E, F, G, AbDiminished (W-H)Bb, C, Db, Eb, E, Gb, G, APhrygian DominantBb, B, D, Eb, F, Gb, AbHungarian MinorBb, C, Db, E, F, Gb, ALydian DominantBb, C, D, E, F, G, Ab
Major in All 12 Keys
Practice by Ear
Chords in A# / Bb Major
The A# major scale contains the notes Bb, C, D, Eb, F, G, A. The brightest, most stable scale — the foundation of Western tonal music.
The diatonic chords in A# major are Bb (I), Cm (ii), Dm (iii), Eb (IV), F (V), Gm (vi), A° (vii). These are the chords you can use when writing or improvising in this key — every note in each chord belongs to the A# major scale.
To develop your ear for the A# major sound, use the scale and chord trainers linked above. Being able to recognise these sounds by ear — not just read them from a chart — is what separates musicians who truly hear music from those who only read it.