Usuario:Friera/Taller3
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Se llama temperamento justo a la afinación de los instrumentos musicales siguiendo la norma de igualar la relación de las frecuencias de cualesquiera dos semitonos sucesivos. Para ello es necesario variar levemente la afinación obtenida directamente por armónicos.
An equal temperament is a musical temperament. It is a system of tuning in which every pair of adjacent notes has an identical frequency ratio. Equal temperaments are often intended to approximate some form of just intonation. In equal temperament tunings an interval - usually the octave - is divided into a series of equal steps (equal frequency ratios). For modern Western music, the most common tuning system is twelve-tone equal temperament, sometimes abbreviated as 12-TET, which divides the octave into 12 (logarithmically) equal parts. It is usually tuned relative to a standard pitch of 440 Hz.
Other equal temperaments exist (some music has been written in 19-TET and 31-TET for example, and Arabian music is based on 24-TET), but in western countries when people use the term equal temperament without qualification, it is usually understood that they are talking about 12-TET.
Equal temperaments may also divide some interval other than the octave, a pseudo-octave, into a whole number of equal steps. An example is an equally-tempered Bohlen-Pierce scale. To avoid ambiguity, the term equal division of the octave, or EDO is sometimes preferred. According to this naming system, 12-TET is called 12-EDO, 31-TET is called 31-EDO, and so on; however, when composers and music-theorists use "EDO" their intention is generally that a temperament (i.e., a reference to just intonation intervals) is not implied.