The goal was to create a piece that demonstrated the dynamics and range of the library. I also wanted to illustrate a subtle but interesting detail. On a “real” piano, there is a technique where as one is lifting their fingers off the keys, they press down the pedal. This causes the just released notes to ring out with a reduced intensity and introduces some sympathetic vibration from the other strings. I always check sampled pianos to see if they mimic this behavior. It’s not something one uses all the time while playing but I think it just shows an attention to detail.
You can hear this effect at around 0:27 in the file.