It can be tricky to pick a subject for an open-ended column like the Listener, but when I realized today was Delia Derbyshire Day, my choice was obvious. In the early 1960s, this UK electronic composer and performer helped change the world of sound as we know it.

Derbyshire is most associated with her iconic 1963 version of Ron Grainer’s theme for Doctor Who, but that was the only time in her career that she arranged someone else’s composition. Her body of work includes original pieces for more than 200 radio and television programs, as well as music for stage productions.