Anyone notice the volume just decrease and than increase again slowly and do it regularly? Mine does that sometimes. I don't know what it is. At first I thought it was the speed compensation features but I turned them off and it still does it. Unless there is something I am missing.

 

I think its RPM dependent and quites down a bit when you come to a stop, but gets louder at high RPM to mask the exhaust a bit. My BMW did this, but you could control the amount it intervened or defeat it entirely.

 

I noticed this on a G6 I once rented.

 

But it does it while I am standing their just idling. Next time you X guys with Navi and Rockford fosgates are in your car play an MP3/WAV and listen to it from the beginning. Then listen for the sound volume fluctuations. I bet you guys don't notice it, I only noticed it now and I have 2k miles on it. Sirius is even harder to notice on because it is lower quality. It is there and once you notice it....it is actually annoying.

 

i am pretty sure you can turn it off like every other car out there equipped with it

 

damnit haha if it is annoying then i don't wanna notice it. but yea it gets louder when it should and quites down. something else that is cool is when you go fast enough the map zooms out to display more.