Music is constructed by a harmony of sounds. These sounds, which have 12 keys in western music, have a certain sound wave. These sound waves have particular mathematical ratios to each other. For example, in the middle of the piano within the octave of middle C, the key of A will have a sound wave reading of 442Hz. If we go one octave higher ‘A’ will have a reading of 884Hz. Therefore both A keys would have formed a relationship ration of 1:2. The key of ‘C’ has relationship of 2:3 with a key of ‘G’ or ‘C#’ is 1:12 of ‘C’ in 12-Equal temperament or so on. Many typography elements are also constructed by a mathematical ratios. These two different dimensional worlds seem to be crossed in this point.

Points which is a basis of typography are basically length. Sound frequency, Hz which is a basis of musical notes could be also translated subjectively into length with ratios of each pitch. This project stared from one hypothesis that 72 point which is a bisis of typography point system is as one sound wave unit of 442Hz which is a basis of musical notes. This hypothesis developed into all typographical elements related with length such as paper size, grid, point size, spacing or so on.