Frank Zappa (guitar, vocals, drum machine) Steve Vai (guitar, acoustic guitar) Ray White (guitar, vocals) Roy Estrada (vocals) Bob Harris (boy soprano) Ike Willis (vocals) Bobby Martin (keyboards, saxophone, vocals) Tommy Mars (keyboards) Arthur Barrow (keyboards, bass, micro bass, rhythm guitar) Ed Mann (percussion) Scott Thunes (bass) Chad Wackerman (drums) Vinnie Colaiuta (drums) Craig Steward (harmonica) Dick Fegy (mandolin) Marty Krystall (saxophone) (Instrumental)