FRANCK, I think you are talking about a mastering EQ. I think this is best done in a DAW. But what you are requesting might be able to be accomplished. In the mixer/plug-in screen add a mastering plug-in window. The plug-ins in this window would effect the entire mix. If you really want this add it in the Wishlist forum.

IMHO I think it is best to keep BiaB as a backing track generator and leave things like this to a DAW. YMMV


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64 bit Win 10 Pro, the latest BiaB/RB, Roland Octa-Capture audio interface, a ton of software/hardware