technoguy

Equal temperament is a scheme of musical tuning in which an interval, usually the octave, is divided into a series of equal steps (equal frequency ratios), forming an equal division of the octave. The best known example of such a system is twelve-tone equal temperament, sometimes abbreviated to 12-TET, which is nowadays used in most Western music. Other equal temperaments do exist (some music has been written in 19-TET and 31-TET for example, and Arabian and eastern styled music is based on a twenty four tone equal temperament), but in the Western world when people use the term equal temperament without qualification, it is usually understood that they are talking about the twelve tone variety.

Desiree

So twelve tone is the most common used in english speaking countries?