I'd like a fix for this as well.. I don't really need Sygic's voice blaring at me over the car's speakers. It's even more annoying when I'm on a phone call and the voice instructions come through and completely blow away the conversation

The N900's speakers are more than loud enough for Sygic IMO, but currently the only way I can find to keep its audio there is to turn bluetooth off on the phone so it doesn't connect to my car's hands-free. Obviously not the best solution...

Anyone have any ideas?