MP3 to MIDI and Back?

[George K]

I have some older recordings that I made on an old digital piano. It only had a USB port for recording and I used GarageBand to convert to MP3.

The quality of the playing instrument sucks - it sounds like a cheapo digital piano (which it was).

Is there a way that I can export that to MIDI and then back into a piece of software like PianoTeq to improve the piano sound?