The Doors’ self-titled debut album is getting the “expanded version” treatment to mark its golden anniversary. The Doors: 50th Anniversary Deluxe Edition hits stores on March 31, and will include stereo and mono mixes of the original album (remastered, of course), along with a disc featuring live performances from a concert staged at San Francisco’s The Matrix on March 7, 1967. The 3 CD/1 LP set will be fleshed out with a vinyl version of the mono mix.

The deluxe reissue marks the first instance in which the original mono mix has appeared on CD. The live tracks were sourced from recently discovered original tapes, which were previously thought to have been lost. News of the forthcoming set coincided with Los Angeles’s proclamation of January 4 as “Day of the Doors.” Surviving band members John Densmore and Robby Krieger attended the public event, which marked the true anniversary of The Doors’ release. Members of the families of late singer Jim Morrison and late keyboardist Ray Manzarek were in attendance as well.