producer, compiler, editor, composer, performer, conductor, liner notes Ensemble Modern – orchestra Dick Kunc – engineer (1967) David Dondorf – engineer (1991) Todd Yvega – engineer (1991) Spencer Chrislu – engineer (1991) Uri Balashov – cover design Command A Studios – art direction 1967 voices Spider Barbour All-Night John Frank Zappa Euclid James "Motorhead" Sherwood Roy Estrada Louis "The Turkey" Cuneo Monica Gilly Townley Unknown Girl #1 Unknown Girl #2 1991 voices Moon Unit Zappa Michael Rapaport Ali N. Askin Catherine Milliken Walt Fowler Todd Yvega Michael Svoboda Michael Gross William Forman Uwe Dierksen Stefan Dohr Daryl Smith Franck Ollu Hermann Kretzschmar Dweezil Zappa Note and references Note References 1994 albums Concept albums Frank Zappa albums Albums published posthumously Barking Pumpkin Records albums Computer music Electronic albums by American artists Classical albums by American artists Sound collage albums