I have a Z110BT upgraded to the latest software, Z140BT I think.

I remember when it was new if I was playing my ipod or some other audio source and I was using the navigation, the audio level would fade when the navigation spoke. It doesn't do that anymore and I can't find in the settings where to adjust this. Can someone please point me in the right direction. Thanks

http://avic411.com/index.php?/topic/35681-no-mute-on-radioipod-with-navigation-after-z140-update/?hl=attenuation&do=findComment&comment=259429

Yes, thanks for the link but I fixed it soon after I posted the question. I found the mute settings and adjusted accordingly. Thanks again!