After piling up 10 tracks of just Mux Synths and Mudrums, it didn't miss a beat. I also added in a ton of per clip fx using Mux effects. This was me noodling around, but I was amazed at how well Reaper was dealing with all the Muxes, as even on my old core2 laptop it was only showing around 20% processor use with all this going on.
I guess that since Reaper is so well multithreaded it deals with more Mux goodness than Mulab itself can. I know that on this same laptop, I could not have gotten that same setup working in Mulab. Will next try it on my new Ivy Bridge beast.
Have also tried a quick test in Orion 8.5 (32bit) and it worked flawlessly as well. My only comment at this stage is that all Mux floating windows disappear when you click back on the main Mux vst window. Which is not actually a bad thing, just unexpected at first. Is this intentional? Also, I would imagine that a new user would find that going through the presets could be confusing when the MuSynth and Mux ones are mixed together. Obviously they have a very different editing paradigm.
Have also noticed that the Mux turns up separately as a VST effect and VSTi, even though they are really interchangeable.
I will also do some more testing in Maschine and Studio One , when I get a chance. Overall, I am quite blown away by the potential of the Mux goodness combined with Reapers powerful audio editing abilities...a great combo. I think you are onto a winner here, though I do miss the session Mux

