The expanded 50th Anniversary Edition of Paul McCartney & Wings‘, Band on the Run album is available now. It features songs like “Jet,” “Bluebird,” and “Let Me Roll It.” There are several versions available in various formats.

Speaking about the “Underdubbed” mix version, Paul said: “When you are making a song and putting on additional parts, like an extra guitar, that’s an overdub. Well, this version of the album is the opposite, underdubbed.”

The multi-Grammy-winning #1 album, was originally released in December of 1973.