Curious cat nailed the problem...

You can replicate the notes with ease using a variety of methods.... however, the human feel, the characteristic of the instrument and how it's played.... also known as ARTICULATION ... that, is the hard part of replication with patches and samples.

Band in a Box and Real tracks does a decent job in many respects with this issue.... but when you start chopping things apart and putting them back together.... the result will not have the proper articulation.

You can find my music at:
www.herbhartley.com
Add nothing that adds nothing to the music.
You can make excuses or you can make progress but not both.

The magic you are looking for is in the work you are avoiding.