Porcupine temperament modal harmony: Difference between revisions

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Brief Intro to Modal Harmony and MODMOSes: Improved phrasing of William's additions, added reference to my own approach to porcupine modal harmony
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Lhearne (talk | contribs)
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Additionally, chords of stacked sevenths of varying sizes may be used to improve voice leading and add variety. Chords without a 'fifth' are recommended for use on the root for modes without a 3/2 from the root. Further, quartal triads, tetrads, and pentads are available in more variety than in Meantone, and make good use of Porcupine's 11-limit consonances.
Additionally, chords of stacked sevenths of varying sizes may be used to improve voice leading and add variety. Chords without a 'fifth' are recommended for use on the root for modes without a 3/2 from the root. Further, quartal triads, tetrads, and pentads are available in more variety than in Meantone, and make good use of Porcupine's 11-limit consonances.


Stacked 3-step triads may be employed in Porcupine[8] and it's MODMOS, comprising in their root position 3 3:4:5 triads (second inversion major triad) as major 3-step, minor 3-step - major[8] triad - 3 15:20:24 triads (first inversion minor triad) as minor 3 step, major 3-step - minor[8] triad - and 2 9:12:16 triads (second inversion suspended triad) - augmented[8] triad.
Stacked 3-step triads may be employed in Porcupine[8] and it's MODMOS, comprising in their root position three 3:4:5 triads (second inversion major triad) as major 3-step, minor 3-step: major[8] triad; three 15:20:24 triads (first inversion minor triad) as minor 3-step, major 3-step: minor[8] triad; and two 9:12:16 triads (second inversion suspended triad) as major 3-step, major 3-step: augmented[8] triad.
At least one MODMOS of Porcupine[8] contains the same number of major and minor triads as the MOS, but more spread out across the scale, similar to Porcupine[7] MODMOS.


The MODMOS scales of porcupine can be used in conjunction with the regular MOS in order to build powerful tonal movement. While each useful MODMOS has its own distinct name, they most likely will be useful to use as a particular function in each porcupine mode. They can also be used stand alone but little is known about the very complex system of tonality.
The MODMOS scales of porcupine can be used in conjunction with the regular MOS in order to build powerful tonal movement. While each useful MODMOS has its own distinct name, they most likely will be useful to use as a particular function in each porcupine mode. They can also be used stand alone but little is known about the very complex system of tonality.