I am using the Road Tech Bluetooth with the Road Tech Sumo 660. When I using the navigation function while listening to MP3s, the sound will mute when I receive driving instructions from the navigation, but the first part of the instructions are muffled. I usually miss about half of the instructions.

Has anyone had this problem and found a fix? I have the most recent software update installed on the Zumo.

Thanks

 

As was suggested to me when I first got my zumo 660 go to www.zumoforums.com. Some really good helpful folks on there.