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====Consonance and dissonance==== | ====Consonance and dissonance==== | ||
Consonant: | |||
*perfect fifth and fourth | |||
*5/4 and 6/5 | |||
*9/8 and 7/6 | |||
*tritone or half-octave | |||
Semi-consonant: | |||
*16/15 and 10/9 | |||
Dissonant: | |||
*9/7 | |||
*11/8 and 16/11 | |||
*1-step and 21-step | |||
Triads are used to "modulate" rather than to stabilize. | Triads are used to "modulate" rather than to stabilize. | ||
Of the decatonic 1-4-7-9 tetrads, 4:5:6:7 is considered the most consonant tetrad, followed by the minor tetrad 1/(4:5:6:7), followed by other types. | Of the decatonic 1-4-7-9 tetrads, 4:5:6:7 is considered the most consonant tetrad, followed by the minor tetrad 1/(4:5:6:7), followed by other types. | ||