OK, the audio is not great, but this is the 4th of 5 videos I m posting of John Mayall s 2, 5, 13 1st set, and if you ve watched them all hopefully it gives you a good idea of the show. Or maybe you just had to be there. John Mayall harmonica, vocals, keyboard; Rocky Athas guitar; Greg Rzab bass; Jay Davenport drums.