A bridge in popular music is a form of musical notes contrasting with one another. The ragtime progression (E7-A7-D7-G7) often appears in the bridge of jazz standards (Play (help·info)).[1] The III7-VI7-II7-V7 (or V7/V/V/V - V7/V/V - V7/V - V7) circle progression leads back to C major (I) but is itself indefinite in key. References [1]Boyd, Bill (1997). Jazz Chord Progressions, p.56. ISBN 0-7935-7038-7. This short article about music can be made longer. You can help Wikipedia by adding to it. Wikiwand - on Seamless Wikipedia browsing. On steroids.