My headset's mic doesn't work with Ubuntu Studio (Linux)

Hi,<br /> There are a couple of suggestions on this thread:<br /> http://askubuntu.com/questions/508221/sound-input-device-microphone-not-working<br /> (about half-way down the page, the pavucontrol, alsa-base and alsamixer suggestions).<br /> The microphone could be muted (in software).<br /> <br /> Thanks,<br /> Lewis