[...] I'm wondering if the SYNCHRON-ized settings are to be compared to the character EQ (Pre-EQ) or the Room EQ? Or both?
Errrrr ... the RoomEQ affects only the "wet" part of MIR Pro's Output signal (i.e. the impulse responses themselves), while the Character- (i.e. "Pre-")EQs are used for the instruments' dry/direct signals. MIRx and Synchronized VI's rely on both, therefore. The MIR Engine Setting I uploaded in my previous message contains only the RoomEQ, as individual sources signals aren't part of them. - While I've been in the lucky position to differentiate between these RoomEQ settings even further when working on (say) Synchronized Appassionata Violins and Dimension Violns, this is of course not the case in MIRx (Mode), where there are more global settings for _all_ violins, _all_ violas, etc.
... does this answer your question?
/Dietz - Vienna Symphonic Library