Formula and Structure of the A#aug Chord
Interval formula from the root note: 1 — 3 — #5. The chord consists of the following notes:
- Bb — unison and the main tonal anchor.
- D — major third with a bright major quality and clear stability above the tonic.
- Gb — augmented fifth, driving motion forward and best avoided in the bass.
Together, these notes form the harmonic foundation of the A#aug chord, defining its sound and role in the musical context.
Alternative Names for the A#aug Chord
This chord may appear under different names:
- A#aug5
- A#+
- A#+5
All variants refer to the same harmonic structure.
Using the A#aug Chord
Place the #5 in the top voice to emphasize forward motion. Use in passing chords or when preparing modulation. Can be applied for a “color” dominant before resolution.
Conclusion
A#aug is an expressive and versatile chord. Learn several fingerings, experiment with different positions and voice spacing, then try weaving it into your own playing — this will help you quickly find your unique tone.
