How to build you own mp3 player, Does any body know

[boyz]

hello i would like to know how to build your own mp3 player i know the basic but i need a diagram on how to build one. thank you

 

[Killbat]

What kind of MP3 player?

"Build" the software?
Build a set-top box?
Build a car computer?

 

[boyz]

i want a car computer with a display that i can use at home too