Jim gordon (drums) John guerin (drums) Aynsley dunbar (drums) Ralph humphrey (drums) Jack bruce (bass) Erroneous (bass) Tom fowler (bass) Frank zappa (bass, lead vocals, guitar) George duke (keyboards, background vocals) Don “sugar cane” harris (violin) Jean-luc ponty (violin) Ruth underwood (percussion) Ian underwood (saxophone) Napoleon murphy brock (saxophone, background vocals) Sal marquez (trumpet) Bruce fowler (trombone) Ray collins (background vocals) Kerry mcnabb (background vocals) Susie glower (background vocals) Debbie (background vocals) Lynn (background vocals) Ruben ladron de guevara (background vocals) Robert camarena (background vocals) Tony duran (rhythm guitar) (instrumental)