Virtual Audio Cable

  “Virtual Audio Cable is a Windows multimedia driver allowing you to transfer audio (wave) streams from one application to another. It creates a pair of Wave In/Out devices for each cable. Any application can send audio stream to Out device, and any other application can receive this stream from In device. All transfers are made digitally, providing NO sound quality loss.”

You can find it on

And btw, did you know that Microsoft’s MSN searchbot uses Linux-machines to scan the Internet for webpages?