Progression
The I–IV–V in A major
I–IV–V in A major plays A, D and E — I, IV and V — across 4 chords. The three-chord song — folk, country and early rock's whole harmonic vocabulary in one loop.
The chords, in order
1AI
2DIV
3EV
4AI
I–IV–V in A major plays A, D and E — I, IV and V — across 4 chords. The three-chord song — folk, country and early rock's whole harmonic vocabulary in one loop.