Many people also like to upload videos to Facebook. You may be attracted by the background music of a Facebook video and want to save the audio only. Actually, it's unlike the ways of solving how to save audio from Facebook messenger. You need to make use of a third-party Facebook audio converter. WonderFox Free HD Video Converter Factory is a useful tool to download videos from Facebook and convert Facebook to MP3. With it, you're able to extract audio from Facebook video at one go.