If you like this, you might be interested in hearing "micro articulations" in baroque harpsichord music. The most talented harpsichordists, like Scott Ross (RIP), use incredibly minute pauses and lags to add expression to the music, which is otherwise hard to do with a harpsichord, since it does not allow for dynamics like a piano-- the string on the harpsichord either gets plucked or it doesn't, whereas the piano hammer can hit with varying intensity based on how hard the key is pressed. A good example:

https://www.youtube.com/watch?v=vkQp_QIzd7w

and playing my favorite, Scarlatti:

https://www.youtube.com/watch?v=sQm8I8EXZf8

If you did a similar analysis using Audacity as in the article, I'm sure you could find some interesting patterns. Would be nifty to have a deep neural net learn how to mimic this based on a "straight" midi file that doesn't use micro-articulations.