Ok. It works:
var me = participantsController.GetUserByUserID(0);
Console.WriteLine("I am user id: " + me.GetUserID() + ", name: " + me.GetUserNameW());
Console.WriteLine("Muting myself. ");
videoController.MuteVideo();
audioController.MuteAudio(me.GetUserID(), true);
I think I tried muting myself with userId = 0, but that didn’t work off course:
audioController.MuteAudio(0, true);