I made a BIG rookie mistake while under pressure. Equipment malfunction, incorporate brand new to me equipment, blah, blah, blah.... I ended up recording both channels of my XY pair of mics to dual mono (both left and right channels are the exact same. They're a mix of the two XY mics).
I'm about to dive in to attempting to recover something close to a stereo field as opposed to the center-of-the-forehead laser beam that I currently have. Before I do, how would YOU go about salvaging this atrocity?
try this first, and then tweak it:
Have your mono audio on 2 tracks (A,B).
Pan A to left 40%, B to right 40%.
Add Reverb effect to A, "wide open hall", dry out 0dB, reverb out -inf, Early out -5,2dB, Early ref style (mode 8 (8ms pan left))
Add Reverb effect to B "Rich hall", dry out 0dB, Reverb out -inf, Early out -6,1 dB, Early ref style (mode 9 (16ms pan right))
And listen. Never going to be real stereo, just a fake...
You're right. It definitely will not be true stereo.
Something I tried and had a bit of success with: I placed the left channel and right channel on different tracks and panned them 100% opposite of each other. I then delayed the right track by about 15ms. This at least gave the illusion of what defines stereo in an XY pattern (time difference in the mics).