He also made a large number of recordings, many in the field of free improvisation in which he had a particular interest.
At university he already had a keen interest in both the theory and practice of recording, which he shared with a few fellow students including Peter Craven (the two were later the co-inventors of the soundfield microphone, and collaborated on many other projects).
Over the next few years, this interest led to the invention of Ambisonics, which can be seen as a theoretical and practical completion of the work done by Alan Blumlein in the field of stereophonic sound.
The British Library Sound Archive contains Gerzon's collection of tapes, which he kept from his student days.
Readers with a British Library card can book to hear tapes by appointment.