I´m a little bit skeptical about this "How to become a good pianist without any effort" -kind of software
I've been playing these through my Kawai digital and they sound just great!Also useful to play some of them at half-speed. I know MIDIs don't sound too good on a computer, but you can get closer to a good sound by doing this:https://www.informatics-tech.com/how-to-make-midi-files-sound-better.html
I know this is an old topic but I wonder if anyone has any information regarding the pianists who recorded the jazz MIDI files in the collection.