OK, you need to go the A/V menu but without playing any device or radio, then you see in the upper screen a button that says INITIAL, push the button and it will give you 3 options, REAR SPEAKER, VOICE GUIDANCE and I don't recall the last one but it doesn't matter, you need the middle one, in reference to the Navigation Voice Guidance, when you click this button it will give you 3 different options each time you press it, MUTE, ATT, NORMAL, if you choose NORMAL, you will hear the music normally thru the speakers and the Voice guidance will play but won't interrupt the music at all, if you pick