For those interested in more about Derbyshire, https://hn.algolia.com/?q=Derbyshire has previous entries:
* Delia Derbyshire – Sculptress of Sound [video](https://www.youtube.com/watch?v=W0OGeEgwKNs)
* Delia Derbyshire – The Delian Mode [video](https://www.youtube.com/watch?v=n2dvGQ32q8g)
* How Delia Derbyshire made the Doctor Who theme (1965)(https://www.youtube.com/watch?v=qsRuhCflRyg)
plus links to essays and other text about her.