The (quality of the) sounds from midi depend entirely on what you are using to synthesize your sounds. You are likely using the default Windows synthesizer, which produces rather poor quality (cheesy) sounds. Using a soft synth (like Virtual Sound Canvas - included with BIAB) is a definite step up. There are external midi synths that are absolutely superb. There is a demo somewhere on this site of different synth sounds. I don't have time to look for it right now - I'll try to link you to it later.

Just remember: midi itself doesn't produce any sounds, just directions of what notes to play, how long, how loud, etc. It takes a synthesizer (often computer software these days) to actually make sound.

Bruce

Macbook Pro 2018
2.6 GHz 6-core Intel Core i7, 16 GB RAM
OS Monterey
BIAB for Mac 2022