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The fundamental principle of bass management (also called LFE crossover) in surround sound replay systems is that bass content in the incoming signal, irrespective of channel, should be directed only to loudspeakers capable of reproducing it, whether the latter are the main system loudspeakers or one or more subwoofers. [1]
The Maneri-Sims notation system designed for 72 EDO uses the accidentals ↓ and ↑ for 1 / 12 tone down and up (1 step = 16 + 2 / 3 cents), and for 1 / 6 down and up (2 steps = 33 + 1 / 3 cents), and and for septimal 1 / 4 up and down (3 steps = 50 cents = half a 12 EDO sharp).
12 tone equal temperament chromatic scale on C, one full octave ascending, notated only with sharps. Play ascending and descending ⓘ. An equal temperament is a musical temperament or tuning system that approximates just intervals by dividing an octave (or other interval) into steps such that the ratio of the frequencies of any adjacent pair of notes is the same.
For instance, 660 Hz / 440 Hz (a ratio of 3:2) constitutes a fifth, and 880 Hz / 440 Hz (2:1) an octave. Such intervals (termed "just") have a stability, or purity to their sound, when played simultaneously (assuming they are played using timbres with harmonic partials) because pure intervals do not waver or beat regularly.
This is the most common tuning system used in Western music, and is the standard system used as a basis for tuning a piano. Since this scale divides an octave into twelve equal-ratio steps and an octave has a frequency ratio of two, the frequency ratio between adjacent notes is then the twelfth root of two, 2 1/12 ≋ 1.05946309... .
Sevendust uses this tuning a half-step down on "Home". Periphery uses this tuning, but tuned 1 step down on "Reptile", The band Architects also use this tuning, but tuned one and a half step down, since their album Lost Forever // Lost Together released in 2014 and Wage War tuned 2 steps down on several songs [57]
In radio equipment, Automatic Frequency Control (AFC), also called Automatic Fine Tuning (AFT), is a method or circuit to automatically keep a resonant circuit tuned to the frequency of an incoming radio signal. It is primarily used in radio receivers to keep the receiver tuned to the frequency of the desired station.
This tuning uses mostly pure fifths, as in Pythagorean tuning, but each of the fifths C–G, G–D, D–A and B–F ♯ is made smaller, i.e. tempered by 1 / 4 comma. No matter if the Pythagorean comma or the syntonic comma is used, the resulting tempered fifths are for all practical purposes the same as meantone temperament fifths.