if u hav portable gps and ur listenin to music with ur car's stereo u'll just have to put the volume up on the gps so u can here the text to speech and pause the music to use voice recognition. in built systems do this for u
So here's something I don't understand about the text-to-speech and voice recognition features of GPS. How can one listen to music while driving and still have those features on?
I've never owned a GPS and never been in a car with one. In theory, both of those features are cool and helpful, but when I'm on the road I'd rather have music on than sit in a quiet environment from time to time interrupted by a voice telling me to turn right on this street. What am I missing?

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic