I have this file, which has content in it for sure, I know what format it should be, but the extension of the file is ".txt". It should be an mp3, but it isn't, here is what the file looks like:

Does anyone know what is the name for what happen there? I mean, what kind of file is? Like, the name, to Wikipedia this phenomena, you know, to investigate what it is. The keyword, how are this file types named. Hash files? Are this hash files? And if not, what are they? Because hash files don't have so much character types, right? Then how are this named?

I would like to ask in advance: what software I can use to decrypt this?