Quote:
Push To Talk - Clicking the 'Setup' button, fourth down on the right, will open the settings screen (You can not transmit while this window is open). Turn on 'Use Push-to-Talk Hotkey', or else we'll hear you every time you cough or yell at your dog). In the box below labeled 'Hotkey', hover your mouse and click whatever key you want to bind. Every time you press this, we hear you Thus, use something that you don't press often (middle mouse button, Numpad Plus, Tab, '~' or Caps Lock). You can check the 'discard hotkey' option so that you aren't always turning caps lock on and off (or whatever key you're using).
Source :
http://praxis-initiative.com/index.php?id=&ident=&action=voice
