I generally have Pandora or other audio from my phone streaming over my car audio system when driving. For some reason if I have navigation running at the same time the navigation voice is twice as loud as the music. It means I either have to turn the music down ridiculously low or the nav voice will come on and hurt my ears. If I turn the volume down on the phone to reduce the nav voice then the music goes down at the same time. Has anyone else had this problem and if so did you find any solution?