Today after a lunch stop my audio system would cut out the music when hitting the throttle and make a on off buzz continuously until letting of the throttle. It did not matter whether it was FM, IPOD, XM OR CB. When letting off the throttle music was back to normal. At cruise going level it would work on and off. Turned off the auto sound level no help. Stopped and put in neutral and revved it up and music was fine. It only happens when moving. Any suggestions as closest dealer is 50 miles.