Recently I bought a new device, the H4n and I turned on the M/S Matrix feature. I did not know it applied to the XLR inputs so I M/S Matrixed a source that was already perfect stereo. I know there is a way through inversion and all sorts of other stuff to create an M/S mix after the fact. Is there any wya to undo an M/S mix to get the original stuff back? Just to be clear I fed my VP-88 into a unit that thought it was receiving an M/S microphone input and properly (improperly in this case) decoded the M/S information. Since the VP-88 mic already does this this second step was not helpful at all. How do I reverse this?