It seemed sensible, before starting to do the video on recording choirs, to explain a little about the differing techniques you can use to record 'real' stereo - as in recording the placement of individual sound sources within a stereo soundfield. Quite different from our usual multitrack method of panning the various tracks to their proper location. Recording with just a pair of microphones means we have to do the job in particular ways - and many of these have 'labels' - X/Y, A/B, ORTF, Blumlein, M/S and many others.

I've tried to explain in the video what the practical differences are, and how they work.