I was hoping this would summon the Oracle Of Reverb @ndeshpande, for the inner workings of the algorithm. You’ll have to settle for my experimental Program, and some speculation. I held off on blurting anything out before I had a chance to look deeper into it.
If a bit cryptic, I think the description below is accurate. The part that may be ‘missing’ is that A/B Mix at A10+B10 is getting distributed equally to Reverb A & Reverb B (same mono signal for each), and then it gets split to a stereo image.
With stereo outputs, you may turn [A/B Mix] parameter fully clockwise for dual mono reverbs (A on left, B on right). A mono input will be sent to each reverb, while a stereo input will send input 1 to reverb A, and input 2 to reverb B.
With a strong center focus, but definitely information spread across the stereo field. Whether that’s by frequency, some (but not all) all-pass filters, black magic … I don’t know.
In the Dual Mono parameter setting, your input (mono) goes exclusively to the left / Reverb A, and effectively that same mono signal goes to the right Reverb B. Panned reverbs, yes, but not exactly the same as two reverbs mixed together and spread to a stereo output. On to lab testing …
