You can create a compressor/limiter/expander/gate with any block that has an assignable level. Assign the level to a modifier, select "Envelope" as the controller, then use the parameters on the Envelope and Modifier pages to set the ballistics. The controller page gives you threshold, attack and release times, and gain (controller gain, not signal gain), and the modifier gives you all sorts of settings you don't have in a conventional compressor. The possibilities are endless.