[hyperboimmv]

But the audio goes through a little speaker mounted under my seat. Using his module, the radio switches sources, so its like an auto mute, plus the audio would go through the car stereo instead of the little loudspeaker.

I mean its either this, or connecting relays to the audio out wires on the back of the radio, with some sort of method of preventing amp thump, so when a call comes in, the relays switch over to the hf kit and the sound goes through the radio. I don't want to have that sort of a hacked setup.