chas521 wrote:I could be mistaken but isn't that how these devices work? The navigation audio command cuts out the radio when it is making a voice navigation and the radio comes back on when it is finished.

Some do, some don't. I also have an 8" screen one that is unfortunately just a little too big and snags the steering wheel. That quietens the radio but doesn't cut it out for nav announcements, and that is MUCH better.

My device a chinese 2 DIN with Primo 1.1 and the original sys.txt in post #5 (except csv_voice_enabled=1 that i added only for testing Primo 1.2 and Primo 2) works fine. Infact when there is a announcement from the navi, the volume of the radio or CD player is reduced and must be like this. If there is an incoming call, the telephone has a priority over all. Anyway all those strings in [sound] according to my opinion are made for my specific device.