Lumpy Gravy

Frank Zappa - Guitar, Keyboards, Vocals
Eric Clapton - Guitar
Paul Smith, Pete Jolly, Lincoln Mayorga, Michael Lang - Piano, Celeste, Harpsichord, Keyboards
Frank Capp, Shelly Manne, John Guerin - Drums
Victor Feldman - Percussion, Drums
Roy Estrada - Bass, Vocals
Mike Lang - Piano, Electric Harpsichord
...and many others

If you know this album you can review it.