While virtual instruments and sample libraries have come a long way since the early 1980’s, you might find that the musical ideas that you create using MIDI still sound like, well … MIDI. The dynamics, tone and overall feel of music produced using MIDI tends to be lacking in comparison to music created using more traditional means. Here are some tips if you want to make your music sound less like it was created using a digital protocol, and more like an organic, expressive musical performance.
Always good to know how to help the “cheesy” sounds that MIDI instruments sometimes produce. New things in Logic Pro X allow for articulation to help. Miroslav Philharmonik has some decent articulations as well. Music has to breathe at a natural pace.
The latest MIDI specification includes Polyphonic Expression — new things happen! This should help. Like listening to a Disklavier that uses the “extra” performance information.