I was sorry to hear of the passing of Bebe Barron, Pioneering Electronic Composer.Create Digital Music have published an excellent Obituary with a number of other links including a detailed article on  Matrixsynth

Terry Hennessy, instrument builder of the strange and wonderful, includes the Bb Army Boot in his repertoire. Brass, leather, copper and…humour! I love the iconoclastic and the irreverent. Thank you, Garth, for those horns!