Progressions in A — Venezuelan Cuatro

A major harmonises to A – Bm – C#m – D – E – F#m – G#°; A minor to Am – B° – C – Dm – Em – F – G. Each chord links to its Venezuelan Cuatro grips, so a whole key becomes a short list of hand positions.

Two things move at once here, and only one of them is the harmony. Changes land on the strong beats of the bar while the strumming hand keeps its own count going underneath — three against six, with the brake marking whichever of the two you want an audience to feel.