How to play A#7: a dominant 7th built on A#, with 4 ways to play it, the notes, the keys it belongs to, and songs that use it.
The first diagram is a common voicing: played at the first few frets. An X above a string means don't play it; an O means play it open.
Frets from the low E string to the high E string: x 1 3 1 3 1 (x = not played).
| Note | A# | Cx | E# | G# |
|---|---|---|---|---|
| Interval | R | 3 | 5 | b7 |
A#7 is a dominant 7th with A# as its root. The full theoretical spelling is A#, Cx, E#, G#. This voicing sounds every chord tone.
A#7 is a diatonic chord (built from the key's own notes) in 1 major key and 2 minor keys. The roman numeral is the chord's place in that key; tap a key for all of its chords.
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A#7 is spelled A#, Cx, E#, G#: the root, 3rd, 5th, flat 7th. The common guitar voicing sounds every one of them.
Frets from the low E string to the high E string: x 1 3 1 3 1 (x means the string is not played). Lay your index finger across the 1st fret from the A string to the high E string (a barre). Add the D and B strings at the 3rd fret. Strum from the A string down; the low E string stays silent.
A#7 belongs to 3 keys: Eb major (the V chord), C minor (the VII) and D# minor (the V, from the harmonic minor).
