i think that the start for a developer to implement media control trough the 3.5 av jack (remember, i'm a newbie, have mercy ...) is this pdf
http://sw.nokia.com/id/81ba2105-f16d...on_v1_0_en.pdf
I was just trying to understand if it were possible to control media player (or mpd) trough an adapter like the nokia ad-54. i think it's really out of my reach.
if something has already been implemented i would like to know, if you can remember it. if not i will search the forum as soon i can get an ad-hoc connection with mer