User:Unque/15edo-Chords: Difference between revisions

Unque (talk | contribs)
mNo edit summary
Unque (talk | contribs)
No edit summary
Line 3: Line 3:
When creating chords in 15-EDO, I tend consider the sum of the stacked intervals to be more important for the chord's function than the values of those intervals; for instance, 4+5 and 6+3 both have a sum of 9, so the chords [0 4 9]\15 and [0 6 9]\15 would be placed into the same category despite having completely different step sizes.
When creating chords in 15-EDO, I tend consider the sum of the stacked intervals to be more important for the chord's function than the values of those intervals; for instance, 4+5 and 6+3 both have a sum of 9, so the chords [0 4 9]\15 and [0 6 9]\15 would be placed into the same category despite having completely different step sizes.


Here, intervals borrowed from the equi-Pentatonic scale (5-EDO) will be used as the "target" intervals - those are steps 6, 9, and 12 of 15-EDO. Two intervals that add up to 6 form "Suspended" triads; intervals adding up to 9 form "Pathic" triads; and intervals adding up to 12 form "Metallic" triads. Note that these names are idiosyncratic, and do not reflect any mathematical or harmonic properties of these chords.
Here, the intervals inherited from the 5-EDO will be used as the "target" consonances - those are steps 6, 9, and 12 of 15-EDO. Two intervals that add up to 6 form "Suspended" triads; intervals adding up to 9 form "Pathic" triads; and intervals adding up to 12 form "Metallic" triads. Note that these names are idiosyncratic, arbitrary, and do not reflect any mathematical or harmonic properties of these chords.


Additionally, the target intervals can be Augmented or Diminished if they are raised or lowered by one step of 15-EDO. Intervals adding up to 7 form "Suspended-Augmented" triads, intervals adding up to 11 form "Metallic-Diminished" triads, etc.
Additionally, the target intervals can be Augmented or Diminished if they are raised or lowered by one step of 15-EDO. Intervals adding up to 7 form "Suspended-Augmented" triads, intervals adding up to 11 form "Metallic-Diminished" triads, etc.
Line 14: Line 14:
* [0 2 9]\15 would be called PatL, or Pathic Superlead.
* [0 2 9]\15 would be called PatL, or Pathic Superlead.


Note that under this chord naming scheme, the inversions of a given chord will have a different name and function; for instance, the Pat3 chord can be rotated to form a PatAug2 chord, and again to form a MetDim4 chord.
Note that this naming scheme specifies which inversion a chord is in; for instance, the Pat3 chord can be rotated to form a PatAug2 chord, and again to form a MetDim4 chord.