Brilliant - so that's how the my copy of Mike Oldfield "Boxed" (https://en.wikipedia.org/wiki/Boxed_%28Mike_Oldfield_album%2...) was supposed to work. As I didn't have the cash to buy a quad player I never got to hear it in "Glorious quadrophonic sound", I had to use an "old tin box".

It always baffled me that it also worked on an ordinary stereo - and I sometimes wondered if I had been had.

We now have the tech to encode many channels in one MP4 stream, but don't we don't bother and just stick to 2 for sound. What does that tell us about the future of 3D TV and 360 degree video? Perhaps more of us will stick to the old tin boxes.

http://www.discogs.com/Mike-Oldfield-Tubular-Bells/release/6...