Jan Boerman (1923-2020), a pioneer of electronic music in the Netherlands, was a master of “pure” electronic music. Most of his work consisted of music whose sounds were mostly electronically generated and was entirely recorded on tape. Boerman has, however, worked in other genres and hybrid forms. His music is distinguished by “human” qualities such as sonic beauty, an illusion of spaciousness, and dramatic build-up. A significant structural principle of his work is its temporal ordering according to the Fibonacci series, corresponding to classical Golden Section proportioning.