I did a cover of the David Gates/Bread song Guitar Man.
I spent quite a lot of time on it. It is one of my favorite songs.
So I first had to choose a preset drum track on my keyboard, then with the chord changes charted, I recorded and accompaniment track (Drums, Bass etc).
Then, I had to make about 15 tracks to get all that guitar stuff, using just my keyboard and the computer software.
I DID save a beginning clip of that process

I was only singing to keep my place in the process.
I did this over and over for the various guitar tracks.
Then I DID record me singing (with added original Harmonies) to my finished midi file.
Not to be bombing your post, but...
from 2015