A♯dim 7-string guitar chord

How to play A♯dim on 7-string guitar

The most common way, the first shape above: your index finger on the A string at the 1st fret, your middle finger on the D string at the 2nd fret, your little finger on the G string at the 3rd fret and your ring finger on the high B string at the 2nd fret. Let the high E string ring open. Don’t play the low B and low E strings.

From the low B string x x 1 2 3 2 0 (x: not played, 0: open)

What notes are in A♯dim?

A♯dim, A♯ diminished, is A♯, C♯ and E: the root (A♯), the minor third (C♯) and the diminished fifth (E). Its formula is 1 ♭3 ♭5.

What is the difference between A♯dim, A♯m7♭5 and A♯dim7?

A♯dim is three notes, A♯, C♯ and E. A♯m7♭5 adds the minor seventh, G♯; A♯dim7 adds the diminished seventh, G, a half step lower.

Where does A♯dim go?

Most often up a half step, to B: it is the chord on the seventh note of a major key, leading back to the tonic.

Keys with A♯dim

A♯dim is the vii° chord in B major and the ii° chord in G♯ minor.