A♯ Minor
Key Signature
| Property | Value |
|---|---|
| Tonic | A♯ |
| Mode | Minor |
| Accidentals | 7 sharps |
| Key Signature Notes | F♯, C♯, G♯, D♯, A♯, E♯, B♯ |
A♯ minor has seven sharps and is enharmonically equivalent to B♭ minor. It is rarely used in practice; B♭ minor is the preferred notation for most composers.
Diatonic Chords
The seven diatonic chords of A♯ Minor — each built on a scale degree using only the notes of the key signature:
| Degree | Roman Numeral | Chord Type | Chord |
|---|---|---|---|
| 1 | i | Minor | A♯ Minor |
| 2 | ii° | Diminished | B♯ Diminished |
| 3 | III | Major | C♯ Major |
| 4 | iv | Minor | D♯ Minor |
| 5 | v | Minor | E♯ Minor |
| 6 | VI | Major | F♯ Major |
| 7 | VII | Major | G♯ Major |
Related Keys
- Relative Major
- C Sharp Major — shares the same key signature.
- Parallel Major
- B♭ Major — same tonic, different key signature.
See all key relationships on the Circle of Fifths.
Scales in A♯ Minor
Common scales built from the A♯ tonic:
Transposing Instrument Context
Sharp-key signatures like A♯ Minor are comfortable for open-string instruments (guitar, violin). B♭ instruments (trumpet, clarinet, tenor saxophone) read in B♯ minor to sound A♯ Minor. E♭ instruments (alto saxophone, E♭ clarinet) read in F♯# minor to sound A♯ Minor. Standard guitar tuning (E A D G B E) resonates naturally in A♯ Minor.