Rock 1973.09 CD, LP, Cassette Studio Rykodisc ASIN: B0000009SG Frank Zappa George Duke - Synthesizer, Keyboards, Vocals; Bruce Fowler - Trombone; Jean-Luc Ponty - Violin, Keyboards, Baritone Violin; Sal Marquez - Trumpet, Vocals; Tom Fowler - Bass; Alex Dmochowski - Bass; Ralph Humphrey - Drums; Ricky Lancelotti - Vocals; Ian Underwood - Clarinet, Flute, Guitar, Keyboards, Sax (Alto), Sax (Tenor), Wind Ruth Underwood - Percussion, Keyboards, Marimba, Vibraphone; Kin Vassy - Vocals Frank Zappa & The Mothers<br> Time 34:25 <br> Frank Zappa - Guitar, Arranger, Conductor, Keyboards, Vocals, Producer