Have you taken a look at the make noise RxMx. Very smart. Big and more expensive but for performance this module is something special. You can fade 6 channels besides some other vca functions
-- joncharliefeathers
Now this is an interesting module, I've been thinking of testing out vactrol's for a project. Have to be careful about budget so this will be out of reach at the moment but well worth me looking at in the future.