I'm having a little trouble with the remote audio adapter. Yesterday I encountered a K-band speed sign which was driving me nuts so I hit the mute. Rather than staying muted it would unmute for a single brap ever three of four seconds. brap brap brap brap BRAP brap brap brap brap BRAP...you get the idea, very annoying once you get out to 45 seconds or a minute at a toll plaza. Anybody else seen this?