scookSoft synths are plug-ins too. Plug-ins be they synths or effects may be frozen in a track. If the effects are on a bus, either move them to an aux track, which has a freeze option, or bounce the bus and delete the plug-ins.
scookAn aux track works just like any other audio track, the difference is the input source. An aux track uses one or more other tracks as input. There must be data in the track to freeze. Record the track then freeze it.