And if you mute the volume, it might also mute the mike on your VOIP device and not unmute it when you unmute the main. Oh, you can attempt to disable that, but it may or may not take. If I want less sound in the room when I pick up my Magic Jack phone, *I* will adjust that to my liking. While some like its features, which include taking over and managing 'communications devices' (telephone/VOIP), as well as tampering with volume settings when you change apps or devices you are using, I don't like them. I'd rather it be by device, not by application as they have it. However, of all the things I love about Windows 7, the sound mixer is not one of them. Eventually we will try to be compatible with 7 or whatever.