You don't really need a virtual audio cable to do any of this if you have a built in soundcard like a realtek HD or so on, you just go to mixer and change the record source to master, this will record whatever is playing out of the master channel of the built in interface, quite a lot (Most in fact) of add on audio interfaces offer the same built in functionality too. Soundflower is free, open-source, and runs on Mac Intel and PPC computers. Soundflower is easy to use, it simply presents itself as an audio device, allowing any audio application to send and receive audio with no other support needed. If you want multiple segments of the audio, or are not entirely certain which segments of audio will ultimately be used, this enables capturing it all in one take. Soundflower is a Mac OS X system extension that allows applications to pass audio to other applications. To build Soundflower, open a terminal window and cd to the Soundflower folder. In fact, this is exactly how I grabbed the audio from the public domain film Duck and Cover for The downside to this method is that if you want only a very small piece of audio from a long video, you will need to grab the entirety of the audio, then chop it up separately in Maschine's sampler or in another program. Originally by ma++ ingalls for Cycling74Revised by Tim Place, 16 October 2008, for version 1.4.

It is intended to download/convert a variety of video files, but can also convert to MP3, including the audio only of online/offline video files. If using Firefox as your Web browser, I strongly recommend which I have been using for seemingly forever.

Soundflower For Windows 7