SRL for [devised]: Keeping the mood light , the two then chanted and chortled their way through some murderous polyrhythms , [devised] by Mr. Douglas as an alternative to Hindemith 's dry theory - teaching techniques , and then , with Mr. Gomez , soared and improvised on the composer 's tight `` Bebop Etudes . ''
ARG-1: some murderous polyrhythms | ARG-0: by Mr. Douglas | ARG-2: as an alternative to Hindemith 's dry theory - teaching techniques