I installed Ca-Fi head unit (Android 2.2) in my car about year ago. In Android settings I can select what speaker I want to hear the navigation voice. Then when I use Sygic, this works perfectly fine, when Sygic starts speaking, the music is fading out and then it comes back to its normal volume.
I much prefer to use iGo as I can customise it as I want, but the issue is when I listen to radio, sometimes iGo voice cuts off, then music stops playing for a few seconds, and the next voice phrase plays in all speakers despite it was t set only for one speaker. Did anyone came across the same issue or have a solution for this problem?