The A Diminished Arpeggio (also referred to as A Dim) contains the following notes:
A – C – Eb
It is essentially an A minor chord, with a flat 5.
Here’s how to play the A diminished arpeggio in the open position.
A Diminished Arpeggio CAGED Positions
Here are the 5 CAGED positions for the A diminished arpeggio on the guitar (notes and tabs).