A#

Symmetric Scale

A# / B♭ Diminished (H-W)

8-note alternating half-whole scale. Tense, jazzy, used over dominant and dim7 chords.

Notes in A# Diminished (H-W)

Bb1
B2
Db3
D4
E5
F6
G7
Ab8
Bb8

Chords in A# Diminished (H-W)

8 diatonic chords
DegreeChordNotesQuality
iBb°Bb – Db – Ediminished
iiB°B – D – Fdiminished
iiiDb°Db – E – Gdiminished
ivD°D – F – Abdiminished
vE°E – G – Bbdiminished
viF°F – Ab – Bdiminished
viiG°G – Bb – Dbdiminished
viiiAb°Ab – B – Ddiminished

Other Scales in A#

MajorBb, C, D, Eb, F, G, ANatural 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 (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

Diminished (H-W) in All 12 Keys

CC C# D# E F# G A A#C#D♭Db D E F G Ab Bb BDD D# F F# G# A B CD#E♭Eb E Gb G A Bb C DbEE F G G# A# B C# DFF Gb Ab A B C D EbF#G♭F# G A A# C C# D# EGG G# A# B C# D E FG#A♭Ab A B C D Eb F GbAA A# C C# D# E F# GA#B♭Bb B Db D E F G AbBB C D D# F F# G# A

Practice by Ear

Scale RecognitionIdentify the Diminished (H-W) scale by ear →Play A# Diminished (H-W)Hear the scale and practice recognising it →Chord Recognition TrainerIdentify the chords above by ear →Progression TrainerIdentify common progressions in this key →

Chords in A# / Bb Diminished (H-W)

The A# diminished (h-w) scale contains the notes Bb, B, Db, D, E, F, G, Ab. 8-note alternating half-whole scale. Tense, jazzy, used over dominant and dim7 chords.

The diatonic chords in A# diminished (h-w) are Bb° (i), B° (ii), Db° (iii), D° (iv), E° (v), F° (vi), G° (vii), Ab° (viii). These are the chords you can use when writing or improvising in this key — every note in each chord belongs to the A# diminished (h-w) scale.

To develop your ear for the A# diminished (h-w) 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.