I just found an awsome app that allow to have a better sound on our desire (only with headphones). I can now use my Desire like a mp3 player.
It use a bug discovered in the app "freebox mobile".
Here is the link ^^
(the app cost 1euro, but you can try it for 7 days for free)
Now my question is, does anyone know a native working method to do the same trick ?
I really don't like when my Desire is overloaded of apps.