"It seems likely that the blues turnaround evolved from
ragtime-type music", the earliest example being I–I7–IV–iv–I (in C: C–C7–F–Fm–C), "The Japanese Grand March". This is a plagal cadence featuring a dominant seventh tonic (I or V/IV) chord. However, Baker cites a turnaround containing "
How Dry I Am" as the "absolutely most commonly used blues turnaround". ==Analysis==