High Quality Content by WIKIPEDIA articles! In musical tuning, a temperament is a system of tuning which slightly compromises the pure intervals of just intonation in order to meet other requirements of the system. In just intonation, every interval between two pitches corresponds to a whole number ratio between their frequencies. Such just intervals have a stability, or purity to their sound, when played with harmonic timbres, or tones with harmonic partials. If one of those pitches is adjusted slightly to deviate from that just interval, the stability decreases and changes in the consonance of the interval begin to appear: an effect known as beating. As the adjustment becomes more severe, the beating becomes faster. To intentionally choose an interval with beating as a substitute for a just interval is the act of tempering that interval. These adjustments can make different musical possibilities available to the musician that would be impractical in just intonation. The actual measure of these adjustments is usually called a comma.

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