if the formats aren't compatible, the hu won't be able to skip them and you can't go through the whole cd. but if you have a newer headunit, then yes it should play both formats.
if the formats aren't compatible, the hu won't be able to skip them and you can't go through the whole cd. but if you have a newer headunit, then yes it should play both formats.
you gonna find that the older HU's play wma files and mp3 files as long as the wma files were ripped with windows media player 9.0 if you ripped them with wmp 10 the HU will not recognize the format. However if it is a newer HU you should not have any problems reading mix cds (this includes files ripped with wmp 10)