Hi Tobias,
The thing is - I'm trying to control the voice's aux send with the bus' RTPC tab.
If you go to Master-Mixer Hierarchy and open the Bus RTPC tab, then look into the list of parameters available for the Y-Axis, you'll find both "Voice Volume" and "Bus Volume".
But in terms of aux sends, there is no "Voice Game-Defined Auxiliary Sends Volume", only "Game-Defined Auxiliary Sends Volume". Same goes for any of the User-Defined ones. It would be really useful to be able to control more 'voice level' parameters but actually controlling them from the bus hierarchy.
Let me know if perhaps I'm wrong and just haven't figured it out.
Kind Regards
Christian