I'm not sure what features are in your version of BiaB. If you've got the VST/DX Synths dialog, you can drop a VST compressor effect into the combo slot, or use the one that comes with BiaB.

Reaper actually comes with a nice set of VSTs which are pretty easy to use. They have a stand-alone set that can run in other DAWs, include BiaB - you can find them here. Obviously, there's the reacomp compressor plug-in. But the reajs plug-in has a number of nice tools as well. Push the Load button on the VST and look under LOSER to find some master limiters. SStillwell has some nice compressors - for example, eventhorizon and fairlychildish.

Since you've got Reaper already installed, keep in mind that the 60 days review period is non-expiring, so you won't lose any work if that period runs out - you'll just get a nag screen, but no lost functionality. I'd just load the .wav files from BiaB into Reaper and put compressors on the FX of the main buss.

Obviously there are other DAWs available - I just happen to be familiar with these, and you'd mentioned that you've got Reaper installed.

You can find other free VST compressors here, and you can find a list of free master limiters here. Again, these should work in BiaB, assuming that you've got a version that supports VSTis on the Combo track.

-- David Cuny
My virtual singer development blog

Vocal control, you say. Never heard of it. Is that some kind of ProTools thing?