Ever since the release of 12.04, TeamSpeak has not been allowing me to talk or hear.
It shows that I have my speakers and my microphone muted/disabled. Could this have something to do with PulseAudio?
I believe Teamspeak uses ALSA by default. try switching to pulseaudio. Should resolve it.
If no audio on your system is working. try the following...
Check under sound setting/hardware.( you can search in unity and gnome for "Sound") if your rig has multiple choices, make sure you have the correct one selected.
Also, if this is a dual boot system. log back into other OS and use the keyboard Hot keys to make sure it's un-muted. ( I had this issue. apparently my card was muted in the hardware not software side. )
reboot into 12.04 and see if that changed it. :)
Also you could try checking opening terminal (ctrl+Alt+T) or search terminal in the gui. once in terminal type: alsamixer make sure all the bars are green. if any are not. navigate to them with the arrow keys and press "M" to toggle mute on/Off
I hope you figure it out. good luck.