I am curious about the April 6, 1969 Flying Burrito Brothers @ Avalon Ballroom recording. What appears here on Wolfgang's Vault is a copy of this show that has circulated for years as various cassette, vinyl and cd bootlegs, under various names and usually with the venue incorrectly listed as Winterland. Listening to this recording, it is obviously a copy of the live radio simulcast of this show that was broadcast over radio station KPFA-FM in Berkeley, with the radio announcer heard giving the station id multiple times during the broadcast. The Wolfgang's Vault recording has all of the problems associated with a recording made from an FM radio broadcast that has been copied many, many times - specifically, FM compression and mucho hiss.
On November 6, 2007 Amoeba Records is releasing this same performance as part of a 2-cd set that also features the April 4, 1969 Burrito performance at the same venue (the Burritos opened for the Grateful Dead each night of the Dead's three-night stand - April 4-6). The Amoeba Records release is sourced from Owsley "Bear" Stanley's original soundboard tapes that have been stored away in the Grateful Dead's tape archives for the past 38 years.
That said, how can Wolfgang's Vault claim to be the licensee of this concert if all they have here is just another copy that was recorded off of the radio and circulated among collectors for years? If that makes Wolfgang's Vault a licensee, then does everyone that has a copy of this concert qualify as a licensee?
