Well, this goes way beyond remastering, but I've often wondered if modern techniques could do anything with the Yardbirds' 1968 Anderson Theater concert. To cover up repeated recording mistakes, the record company overdubbed crowd noise at seemingly random points, making it sound like the audience is repeatedly shouting "Ole!" during the concert. Jimmy Page hated it so much he blocked its release for a while. For Led Zep buffs, this concert includes the first recording of "Dazed and Confused."