VB-Audio – A free (as in beer) alternative to Virtual Audio Cable (VAC) for Windows

There are many use cases where you need virtual sound cards. For example to create Audio bots for Mumble. Most users know only Virtual Audio Cable for that purpose, but there is a free alternative called VB-Audio. See http://vb-audio.pagesperso-orange.fr/Cable/index.htm. It is donation ware so consider a donation if...