In music theory and musical tuning the Holdrian comma, also called Holder's comma, and sometimes the Arabian comma, is a small musical interval of approximately 22.6415 cents, equal to one step of 53 equal temperament, or ( play). The name comma is misleading, since this interval is an irrational number and does not describe the compromise between intervals of any tuning system; it assumes this name because it is an approximation of the syntonic comma ( play), which was widely used as a measurement of tuning in William Holder's time.
Mercator's comma is a name often used for a closely related interval because of its association with Nicholas Mercator. One of these intervals was first described by Ching-Fang in 45 BCE.
Other articles related to "holdrian comma, comma, holdrian commas, commas":
... The name "Arabian comma" may be inaccurate the comma has been employed mainly in Turkish music theory by Kemal Ilerici, and by the Turkish composer Erol Sayan ... The name of this comma is "Holder koması" in Turkish ... rast (similar to the Western major scale) may be considered in terms of Holdrian commas c d e f g a b c' commas 5 ... while in contrast, the makam nihavend (similar to the Western minor scale) c d e♭ f g a ...
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