Twenty-six musicians and groups performed Hold at the festival , including Chuck Berry , Black Snake , Tim Buckley , The Byrds , Chicago Transit Authority , Albert Collins , Crome Syrcus , Bo Diddley , The Doors , Floating Bridge , The Flock , The Flying Burrito Brothers , The Guess Who , It 's a Beautiful Day , Led Zeppelin , Charles Lloyd , Lonnie Mack , Lee Michaels , Rockin Fu , Murray Roman , Santana , Spirit , Ten Years After , Ike & Tina Turner , Vanilla Fudge , Alice Cooper and The Youngbloods .