My wife and I use Cardo Pack Talks and we are experiencing a fluctuation in volume while listening to the radio, Ipod or Apple play. The intercom works fine with no problem with volume. The volume just continually surges up and down with out ever fading out or ever getting too load. We have had these units for some time now but have never used them with a bike integrated audio system. I have gone through all the settings on the bike and on the headsets but no luck finding the cause there. By the way I'm riding a 2018 Tour and it not only happens out on the road but also happens inside a quite garage.