A diminished 7th Chord

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Audible Example

What does a A diminished 7th chord sound like?

A diminished 7th chord

Piano Fingering

How do you play a A diminished 7th chord on the piano?

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Guitar Fingering

How do you play a A diminished 7th chord on the guitar?

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About the A diminished 7th chord

A diminished 7th chord stacks three minor thirds on top of each other, creating a symmetrical and highly unstable sound. This symmetry means the chord can resolve in multiple directions, making it a favorite tool for modulation. It is heavily used in classical, jazz, and dramatic film scores.