I'm hoping someone here with some AV knowledge can give me something to try. When I've got my Incredible hooked up to my car stereo via the 3.5mm jack, and have the car charger plugged in, there is a noticable but intermittent high pitched hiss that comes out of the speakers. If I unplug the car charger it goes away immediately. I've tried with the volume on the Incredible set at quiet/medium/loud levels and that doesn't seem to make any difference. My guess is that there is resonance from the power cable being picked up by the audio cable, but I've tried moving them around and it doesn't seem to help.