sorry but i cannot figure out what u actually intend to ask....
MP3 is a compressed format and how are u planning to compress it...
onubhai said:
Also suggest good formats for music players in cars.
are u manufacturer of car audio systems that u are asking for such suggesions, if not, how can u decide what format u will play in the car, just see what's available in the market and u'll figure out that MP3 is the only wise choice.