Download the free video to MP3 converter from dvdvideosoft.com and install it on your computer. Run the program, click the top Brose button to select the input video file, eneter the Output folder, choose your Presets options from the drop-down menu, and click Convert.

That’s all there is to it, now you can navigate to your output folder and listen to the audio you have extracted.

And here is another free audio extractor that you can use.