Works for USB/HID at least Olympus AS-2300 pedal. http://mediazilla.tte.erve.vtt.fi/~adamski/mplayer_pedal_diff.tgz Tested for practical use with ubuntu Gutsy Gibbon. configure --enable-pedal Signing out of list emediately, contact directly if you should feel like it. antti.damski at gmail.com