Mid/
Side : two mics...a cardiod and a fig of 8.
First, aim the cardiod directly at the source.. as if you were recording in mono. Take that in to a track you call "mid" in your DAW.
Second, use the bottom element(fig 8 ), which is now 90 degrees off-axis from the source, and bring that in on a channel called "side".
To mix, duplicate the side track, and flip the polarity (phase). Lock the two side channels together and bring that into the mix to taste so that the stereo image begins to appear.
I'll do that type of channel swap with SF 7 to hide small flaws (especially works well with split omni's) but you will definately lose most of your stereo image when you do it across an entire show.
What I would suggest is using the good channel as the M and the noisy side as S and just decode to stereo that way. You'll get less noise and a better image than a blend of L & R.
mid/side mixing takes some practice though. Try it a few times and listen to the results to get a feel for how it works.
JAson
Thanks, could you just explain that a little better for my simple ears.
Cheers
Norm