I have a question regarding the AUX input of a Z3. If I have a XM NavTraffic receiver (GEX-P10XMT) connected to both the IP Bus and Data input, would I still be able to use a CDRB10 cable and connect that to the GEX-P10XMT for another audio device (Just an audio source, no video needed). How would the Z3 know which is being used?