I was sad to hear of David's passing. I met him in 1974 when we
organized the Associated Audio Archives, and he was an important
source for us because of his extensive experiences with sound
recordings. I remember one evening after a meeting when David and his
wife invited us to his house for dinner. It was, I believe, on that
occasion that I first heard of, and heard, the Crepitation Contest.
It was an exceptionally enjoyable evening!