Although quite a bit of unissued music that the Velvet Underground cut between 1965 and 1970 has found its way into official release, a lot of other live and studio recordings are floating around that have yet to find their way into official circulation. While many of these (particularly the concert tapes) are just of too low fidelity to ever be considered for official release, quite a few of them are interesting, and certainly of great historical value in gaining insight into the band not available from the official discography. Here's a list of the best, all of them described in greater detail in White Light/White Heat: The Velvet Underground Day-By-Day.