very vague indeed.
no difference in perceived volume really, the gain was set the same for both sets.
the effect does not make the recording out of phase, while it may adjust the way those OOP signals are handled, but it does not completely reverse it.
I was thinking it was a slight compression / limiter / mid range boost.
but the manual doesn't really specify exactly what is happening.
One thing you can do is add the effect to the raw recording for playback only. that way you can preserve the master as raw, and then see what the effect does or doesn't do for you. the downfall is that I dont think you can apply the effect to the raw recording after the fact. Not w/o doing a real time transfer w/the effect engaged.