A7 shapes on mandolin

A7 is A, C♯, E and G — the 1, 3, 5 and ♭7 of A. On the mandolin there are 18 shapes to walk with ‹ ›; tap any note on the mandolin to pick the shape that holds it. Major triad plus a flat 7th — tense and bluesy About the dominant 7th →

Also written Adom7, A dominant 7, A dominant seventh, Adominant and A dom 7.