When is someone allowed to call themselves a Mastering, or Mixing engineer? Are there certain college requirements, or a degree? What about people that taught themselves, reading, studying, putting in the manhours? I know there are people out there, that didn't go to school for Music Production, Mixing, or Mastering..... Yet, they are great at what they do..... They know all the theory and applications, and successfully apply their knowledge.... yet don't have a certificate that says...."I am a Mixing/Mastering Engineer"....if one exists..... Does one exist?