Aww screw that. Chopin is the guy yer thinking of. Metronome? Eff you. Eat some rubato. The beat is whatever is right in the moment. . Altough Frydyryk would insist upon strict adherence to metronome markings. He was a bit of a dick, and fop, and anti-Semite. But he was a genius tunesmith and contrapuntalist.
Why are musical geniuses so weird?.....................