@Hext: do you have libcelt0-0 installed? If not see the previous messages in this thread on how to install libcelt. If you are missing libcelt the server should inform your client that you may not be able to comunicate with all the other clients. Also neither you should hear your friend nor your friend you. If your friend can hear you without problems and only you cann't hear your friend there is another problem. I discovered yesterday that there seems to be some other problem. I joined yesterday in a conversation with two of my friends. Sending to both of them worked, but I was only aviable to hear one of them. From the other one I didn't hear anything wihle he was sending. All of us were using celt as codec. I have no idea were the problem is yet.