Chord progression · major keys
The I bVII IV progression in all 12 keys
A Mixolydian vamp. The flat seven chord comes from the parallel mode, and it is the sound of a great deal of rock. Also called "1 b7 4" and "mixolydian progression".








How it moves, in C major
- CI
- FIV
- CI
- C to B♭0 voices hold, 4 move, 8 semitones of motion in all.
- B♭ to F1 voice holds, 3 move, 8 semitones of motion in all.
- F to C1 voice holds, 3 move, 8 semitones of motion in all.
It ends on a plagal cadence.