Rock 1975.06.25 CD, LP, Cassette Studio Rykodisc ASIN: B0000009SM Frank Zappa George Duke - Synthesizer, Keyboards, Vocals, Vocals (bckgr); Chester Thompson - Drums, Sound Effects; Tom Fowler - Bass; Captain Beefheart - Harmonica, Keyboards, Vocals; Bloodshot Rollin' Red - Harmonica; Napoleon Murphy Brock - Flute, Sax (Tenor), Vocals, Vocals (bckgr); Ruth Underwood - Percussion, Keyboards, Marimba, Vibraphone; Johnny "Guitar" Watson - Guitar, Vocals; James Youman - Bass Frank Zappa & the Mothers of Invention<br> Time 42:52 <br> Frank Zappa - Guitar, Composer, Keyboards, Vocals, Vocals (bckgr), Producer