Pink Floyd – Speak To Me/Breathe/Time Dark Side of The Moon Collector’s Edition (Alan Parsons Quadrophonic Mix) The Dark Side Of The Moon Quad Mix was originally released on 8-track tape in 1975 and was Pink Floyd’s engineer-Alan Parsons-original vision of the album. I’ve heard quad mixes of other albums and DSOTM really suits a quad mix.It’s quite good….