The Delian Mode -- Film Description:
"The Delian Mode is a short experimental documentary revolving around the life and work of electronic music pioneer Delia Derbyshire, best known for her groundbreaking sound treatment of the Doctor Who theme music. A collage of sound and image created in the spirit of Derbyshire's unique approach to audio creation and manipulation, this film illuminates such soundscapes onscreen while paying tribute to a woman whose work has influenced electronic musicians for decades."
-- Library and Archives Canada

Source:
"ArchiviaNet: Online Research Tool: Film, Video and Sound / ArchiviaNet : Recherche en ligne : Films, vidéos et enregistrements sonores." Library and Archives Canada / Bibliothèque et Archives Canada. https://www.collectionscanada.gc.ca/archivianet/. [English / French]