How to play Adim7: a diminished 7th built on A, with 3 ways to play it, the notes, the keys it belongs to, and songs that use it.
The first diagram is a common voicing: an open-position shape using 1 open string, played near the nut. 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 0 1 2 1 2 (x = not played).
| Note | A | C | Eb | Gb |
|---|---|---|---|---|
| Interval | R | b3 | b5 | bb7 |
Adim7 is a diminished 7th with A as its root. The full theoretical spelling is A, C, Eb, Gb. This voicing sounds every chord tone.
Adim7 is a diatonic chord (built from the key's own notes) in 0 major keys and 4 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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Adim7 is spelled A, C, Eb, Gb: the root, minor 3rd, flat 5th, double-flat 7th. The common guitar voicing sounds every one of them.
Frets from the low E string to the high E string: x 0 1 2 1 2 (x means the string is not played). Lay your index finger across the 1st fret from the D string to the B string (a barre). Add the G and high E strings at the 2nd fret. The A string rings open. Strum from the A string down; the low E string stays silent.
Adim7 belongs to 4 keys: E minor (the iv°, from the harmonic minor), G minor (the ii°, from the harmonic minor), C# minor (the vi°, from the harmonic minor) and Bb minor (the vii°, from the harmonic minor).
