playing MP3 file using arduino and speaker

how do i can play a MP3 from an sd card file using arduino and speaker ?,
i am not asking for code, i am asking for a direction and some examples...

IdanAbutbul:
how do i can play a MP3 from an sd card file using arduino and speaker ?,
i am not asking for code, i am asking for a direction and some examples...

Basically you can't.
You will need an MP3 decoder chip on a shield to feed the SD data to.