Hi, I have a wierd problem. It seems that I am able to 'penetrate' a score when I sight-read it, even though I take it at a slightly slower tempo. I do make small mistakes, but the flow of the music is there. My sense of rhythm is good, and expression just comes naturally and intuitively. However, once I start to work on the details and speed up, it starts sounding like everything is so mathematical and forced with mechanical accuracy! I am just wondering why?