Phyllis Smith Altenhaus worked as an assistant to music producer Tom Wilson in the late 1960s. She assisted with the editing of the Uncle Meat movie in which she plays "herself" and Sheba Flieschman, being seduced by Don Preston and hamburgers. Parts of her contribution to the film can be heard on the CD reissue of Uncle Meat. She also appears in Video From Hell (1987) and The True Story Of 200 Motels (1989).
She played herself in the film "Summer Run" (1974). Altenhaus continued working as a film editor on Woodstock (1970), New York, New York (1977) and The Warriors (1979).
She is presumably the name "Fyllis", mentioned in the list of influences in the sleeve of "Freak Out!".