First of all, you must do these:

1. You must have a video so you can extract audio (.mp3)

2. Download this: http://www.aoamedia.com/audioextractor.htm

3. Install AoA Audio Extractor

4. Run AoA Audio Extractor

5. Drag n Drop the "video" you want to extract audio from

6. Verify the location the audio (.mp3) is going to be saved << Under the "Output Path">>

7. Click the "Start" button

8. Voila!!! There you go, you got your "Audio" extracted.

You can also download music videos from Youtube then extract the audio to get the music for free

Oh by the way, while it "extracts" it says it's converting but I don't think it is because once the finalized audio file (.mp3) was out, the file size was smaller than the video file(s).

Anyways have fun!!!