C Classic Rock Loop
I – ♭VII – IV progression in C major
C Classic Rock Loop — I – ♭VII – IV
The C Classic Rock Loop (C – Bb – F) borrows the ♭VII chord from the parallel Mixolydian mode, giving it a rebellious, anthemic edge. This three-chord riff has powered rock music since the 1960s. With seventh chords (CMaj7 – Bb7 – FMaj7), it takes on a bluesier, more soulful character.