When the music sounds fine but the vocals sound drowned out, that usually indicates a speaker is wired incorrectly (positive and negative leads reversed). But if your car's radio or CD player sounds fine, then it could be your MP3 player's connection. Could you give a little more info about it? Sounds like the aux jack or cable could be the problem.
OK so i have a MP3 player. I have a car aux jack to plug it into. But when i play my Music from the MP3 player through the car it sounds horrible. I can hear the background music great and the vocals sound like the singer is a mile down a tunnel. What can i do to fix this?

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