[Q] Routing aux audio through android topic

Hi

So I have done a Nexus 7 installation into my car to replace the head unit and I am using the Dension DAB+P for my DAB listening needs. The dension has an aux out and my nexus is connected to the head unit via aux cable as well. Is there any way to route the audio out of the dension through the nexus via usb maybe (I have a powered usb hub connected to the nexus) and have the audio go through the aux out of the nexus. I need the volume control on the nexus to control the volume in from the dension as well.

Thanks

Kabeer