Erica writes –

I saw a program of Mary Ellen Bute’s short abstract films a couple weeks back at Anthology and was really impressed. Bute was a pioneering and innovative female filmmaker and animator whose work is still not widely known. Much of her early films function a bit like music videos. She called them “visual music” – she creates graphics through analog means in order to accompany a piece of music.
[…]
Seems to me she would have gotten along swimmingly with Doctor Who theme composer Delia Derbyshire, whose lost experimental audio work, including a techno predecessor from the 60s, has recently been uncovered.

Maryellenbute Visualmusic

The Early Films of Mary Ellen Bute

Mary Ellen Bute: Seeing Sound

More:
Delia Derbyshire Crop
The Radiophonic Workshop