For the past couple of weeks, I’ve been using Mumble to replace a TeamSpeak server one of my friends was paying for. We’re all quite pleased with the results.
Server installtion could not be easier. If you’ve got an Ubuntu server, you can simply install the ‘mumble-server’ package and change a couple of configuration files, you’ll be up and running in no time.
The client side interface is really where Mumble shines. For the first time ever, configuring an audio application on Linux was as simple and painless as it was on Windows and Mac. The voice activation features were more advanced then I’ve ever seen — not just a simple threshold. Echo cancelation seems to be done incredibly well too.
All in all, a very good, very solid application… give it a shot: http://mumble.sourceforge.net/Main_Page