I have added an aggregate audio device, so that I can use two soundcards within Traktor. The master output is coming from the S4 / S5, and the monitor is connected to my bluetooth headset. This works almost perfectly, the latency is acceptable. Only problem is that the cue volume knob isn't working anymore, since this only applies to the jack outputs on the traktor devices, not on my bluetooth headset which is connected to the laptop.
Is there anything I can do to get this CUE volume knob work?