I have read so many posts on the navigation module my head is spinning. Just when I think I know the answer another spin is put on it. I have one on back order and need to know something before I take delivery.

Is the only thing the module does is mute the sound to hear the commands through the speakers? And...do I still have to plug the GPS into the stereo aux port to hear the music stored on the SD card?

If the answers are yes to the above questions I am going to cancel the order. I can spend the money elsewhere and just read the screen as I ride. To hear the commands would be nice but not an absolute necessity.

Thanks in advance for an answer to an already much debated question and hopefully I will find the final answer.