I wonder how many variables it would need to capture differences in human performance. Will it faithfully capture the differences between two world-class player

I wonder how many variables it would need to capture differences in human performance. Will it faithfully capture the differences between two world-class players? Glenn Gould and Evgeny Kissin? How? If it manages to do that, it may incidentally help us understand feelings, or personality. The captured data could be mined to search for the pattern of joy or sadness, for example. Furthermore, given enough data, software could synthethize new pieces. Kissin never blayed Bartok? No problem, just ask the software to 'play' Bartok in his style.