How can I stream music through VoiP?

Question

What I want is: Stream a music through Teamspeak/Skype/Mumble... while I can talk also.
Using Stereo mix is not an option. If I use that, I can't speak, and everyone will just hear themselves.

OS: Windows 7 x64

(The question is rather brief. If you can extend it with anything, please do so.)

Answer 1

Virtual Audio Cable does the thing. It can mix several sources, so you can talk, and stream music at the same time. (And much, much more.) There is a free version available, the V3.