>    Anyways, this is just a thought, and just for fun. I would like you
> to recommend me a PIC microprocessor and some dummy source code
> (managing A/Ds or processing audio) to be able to do that.
> 
>   Many thanks and have fun !!

Look at Roman Black's audio methods.
http://www.romanblack.com/picsound.htm

Just somewhere to start.  May or may not fit your needs.
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