Work gave me a LifeChat LX-3000 headset. I plugged it in, and now Mixer shows it in a bunch of options.

But it doesn't matter which one I select, I can't get sound to go out to the device, not even in Skype which is what I want it for. What am I missing?

:~> cat /etc/lsb-release 

DISTRIB_ID=Ubuntu

DISTRIB_RELEASE=11.10

DISTRIB_CODENAME=oneiric

DISTRIB_DESCRIPTION="Ubuntu 11.10"

Using XFCE4.