James Day: Mr. Stern, you once said the happiness in satisfaction is to play the kind of music that solves all human problems. That's a pretty big order, so what kind of music is it that solve all human problems? How does music impinge upon human problems? ジェーム・デイ スターンさん、あなたは以前、人類全体の問題を解決するような音楽を演奏す…