"He's not a young guy, it's possible he may be the originator of this concept."


Mid-side has been around for a long time. From the article Scott cited:


"Mid-Side microphone recording is hardly a new concept. It was devised by EMI engineer Alan Blumlein, an early pioneer of stereophonic and surround sound. Blumlein patented the technique in 1933 and used it on some of the earliest stereophonic recordings."