Facebook literally took the world by storm. With it, you can share your thoughts, post pictures/videos, create your own profile, share links, send private messages and many more. But one particular demand online, especially to music fanatics, is the ability to upload MP3 to Facebook.(http://www.videoconverterfactory.com/tips/upload-audio-to-facebook.html)
By doing this, users can play and explore songs straight on their profile. You can share audio with friends, post personally crafted audio messages and promote your own songs simply. Since Facebook doesn’t give a button for audio uploading directly, there are several possible ways to help you out.
Information is from https://showmore.com/upload-audio-facebook.html