cleaning up audio

hello everyone, i downloaded a video of a man playing his yamaha dx7, file that was later converted to mp3 file, it is an old recording and i would like to clean up the song, so that it sounds like a professional sounding recording. how is this done…thank you very much here is the youtube like:

The original video has been through special effects and it sounds like the sound has been through multiple copies, not including the trip to MP3, so there is very little you can do to make it sound better. It’s also possible the original show was sent to tape wrong and created the overload there.

Overload and distortion are reliable ways to kill a show. There are no tools to recover.