From LivingPianos.

https://livingpianos.com/how-much-freedom-is-there-in-musical-performance/

Welcome to LivingPianos.com, I’m Robert Estrin. How much freedom is there in musical performance? If you listen to the same piece by different performers on the piano or any other instrument, you’ll find dramatically different interpretations. How much do you have to be faithful to the score, and how much can you just take off and do what you want to do? The answer may surprise you!