The exact intonation of every maqam scale changes with the historical period, as well as the geographical region ( as is the case with twelve-tone equal tempered scale, " maqam " scales are, in practice, learned auditorally.
22.
It was constructed in such a way that the column of air inside the instrument was capable of vibrating at a number of different pitches that corresponded to the notes of the tempered scales of classical music.
23.
"Ludus Tonalis " can be thought of as the most direct application of Hindemith's theory that the twelve tones of the equally tempered scale all relate to a single one of them ( called a tonic or keynote ).
24.
Because of the strong influence of Western European music, present-day performers of Georgian folk music often employ Western tuning, bringing the seconds, fourths, sixths, and sevenths, and sometimes the thirds as well, closer to the standard equally tempered scale.
25.
Frequencies equivalent to the top octave of a piano keyboard can be defined with reasonable accuracy versus the accepted note values for even-tempered scale, to nearly 1 Hz precision in the A440 range, and even more finely at lower pitches.
26.
Byzantine music uses the eight natural, non-tempered scales whose elements were identified by " khoi ", " sounds ", exclusively, and therefore the absolute pitch of each note may slightly vary each time, depending on the particular " khos " used.
27.
The result of HPCP computation is a 12, 24, or 36-bin octave-independent histogram depending on the desired resolution, representing the relative intensity of each 1, 1 / 2, or 1 / 3 of the 12 semitones of the equal tempered scale.
28.
Because seven of the twelve notes of the chromatic equal-tempered scale are naturals ( the " white notes ", A; B; C; D; E; F; and G on a piano keyboard ) this system can significantly reduce the number of naturals required in a notated passage.
29.
It should be noted that though much of Western music has adopted the even-tempered scale, it has been the practice in Germany and Austria to play these notes in position, where they will have just intonation ( see harmonic seventh as well for A 4 ).
30.
However, traditional African tunings use notes that do not lie on the grid of the Western tempered scale, and traditional kalimba note layouts are often idiosyncratic, sometimes with adjacent tines making part of a scale, but then an odd note thrown in that defies the pattern.
