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216 HOPI SONGS |
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Discord is any combination of pitches within the diatonic scale other than the notes of one of its three triads with their octaves, and resolution the sequence of some combination of these upon the discordant group. In the resolution represented, the upper octave of the tonic represents it. Modulation is a change in the conception of the step of the scale represented by a given pitch, entailing changes in the pitches identified with other steps of the scale. It appears in the diagram as a revolution of the triads about the axis of tone. The modulation from D to is shown as a backward rotation (ascent) of the scale through 15°, Si coming to occupy the place of Do. Mutation of |
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