The title of the fictional studio refers to Cathy Berberian, the US soprano who married Luciano Berio, a pioneer of electronic music and a key influence on Strickland's film.
The film Gilderoy works on is entitled 'The Equestrian Vortex'. Typically for giallo films, this title is highly cryptic and absurd; it has no concrete connection with the plot.
First film in 35 years for actress Suzy Kendall.