All of a sudden my Audya doesn´t play most of its audio drums. Still some of them are doing all right, but the rest don´t work. Not very long ago I installed the latest OS, but - as far as I remember - everything seemed to be all right afterwards. So what might have happened? And more important - how could this problem be solved as quick as possible, because I need the keyboard urgently! Thanks for all answers.
P.S.: Restarting didn´t help.