Im actually going to disagree with the mute thing.
THERE ARE WONDERFUL INVENTION'S SUCH AS WINDOWS MEDIA PLAYER/IPOD. USE THEM.
Or go with the votemute program. Seriously, if you want to play music, use a god damn 3rd party source and NOT play it over the mic just to waste everyone's time. In ZS if your dead in action and someone plays a really shitty song (Like everyone always does...but Unit plays good stuff :3), I dont think pausing right in the middle and having to mute would be the right idea. Unless your heavily caded.
Or better yet, use steam browser and go into youtube and do it. Just not play it for everyone.