User blog comment:Tommygun9504/Tommygun9504's Grenade Gazzette - 17 March 2012/@comment-4005921-20120317162639/@comment-1906486-20120317210320

In-game should record the game sound, I'm not entirely sure on disabling mic recording. Since there's really no way I can find, only way I'd say is muting your mic. That or unplug it until you want it used, never really found an alternative..