Modal RunsA#7 Chord (Dominant 7th)
The dominant 7th — root, major 3rd, 5th, flat 7th — is the chord built to resolve somewhere else. The notes of A#7 are A#, D, F, G#.
The engine of the blues and the V chord of every classical cadence: that flat 7th creates a pull toward home that almost nothing else in tonal harmony matches.
A#7 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.
Play it a 5th above any major chord and resolve into it — that V7-to-I motion is the single most common cadence in Western music.
Formula and intervals
R - 3 - 5 - b7 — 4 notes.
Scales that fit A#7
Every scale below contains all of this chord’s notes — safe territory to improvise in over it.
Also compatible: Phrygian Dominant, Diminished (HW).