Modal RunsA#maj7#5 Chord (Aug Major 7th)
Augmented major 7th combines a sharp 5th with a major 7th — root, major 3rd, sharp 5th, major 7th — a rare, deliberately unstable colour. The notes of A#maj7#5 are A#, D, F#, A.
Impressionistic and suspended, closer to Debussy or film-score harmony than anything with a clear pop or rock home.
A#maj7#5 voicings on guitar
Every playable, root-in-the-bass grip standard tuning offers, computed from the chord’s own formula — not a fixed shape library.
Let it hang without resolving — this chord is more interesting sustained than moved through quickly.
Formula and intervals
R - 3 - b6 - 7 — 4 notes.
Scales that fit A#maj7#5
Every scale below contains all of this chord’s notes — safe territory to improvise in over it.
Lydian Augmented