So this thread intrigued me because I really don't like the piped in sound so I started looking at my software version and digging in the I-Drive to find where this might be and if I had the icon to disable. Well I have an older version of the software and I've tried on the app and in the car and it won't update to anything newer. I did find where the icon is located. It's in the configure M mode buttons section and down below it has a button for sound control. I toggled this many times with the car on and I couldn't get it to do anything?
. I didn't notice a change with it on or off. But the exhaust button on the console works as usual. So I really don't know if it does anything or not. I'm going to try it again tomorrow while I'm driving and see.