The coding of information in musical scores

Anyone can play music with adequate musical instruments. However in order to write down music, it needs some notation system to express it. For a long time such notation systems as neumes, mensural notation, and modern notation have been developed, but it would be impossible to perform music adequately only through musical scores. By the way if it is required to read musical scores by computer, it should be known how such notation will change into the capable form to input to computer. This paper presents how such transformation can be done. Whereas music has many sounds at the same moment (simultaneity), continuity (analogue type expression), and subjectivity (is often needed to interpret), the computer has no simultaneity, digital expression, and objectivity. This paper compares the coding system for musical notation in five types of personal computers with the author’s own coding system. [In Japanese.]