Pink Floyd’s The Dark Side Of The Moon has been released in a new 50th anniversary box set containing an endless assortment of mixes on Blu-ray, DVD CD and vinyl. While it includes a bevy of 5.-channel surround and stereo versions, the group’s engineer Alan Parson’s original Quad mix should also have been included but wasn’t. Yet there is a new, never-before heard Dolby Atmos mix,