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 Bb minor. It is rarely used in practice; Bb 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 | C Diminished |
| 3 | III | Major | C# Major |
| 4 | iv | Minor | D# Minor |
| 5 | v | Minor | F 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
- Bb Minor — 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). Bb instruments (trumpet, clarinet, tenor saxophone) read in B# minor to sound A# Minor. Eb instruments (alto saxophone, Eb clarinet) read in F## minor to sound A# Minor. Standard guitar tuning (E A D G B E) resonates naturally in A# Minor.