Dakotismic chords: Difference between revisions

m Recategorize
Xenllium (talk | contribs)
Update the article including recategorize and adding supporting ET
 
Line 1: Line 1:
'''Dakotismic chords''' are [[essentially tempered dyadic chord]]s tempered by the dakotisma, [[595/594]].  
'''Dakotismic chords''' are [[Dyadic chord|essentially tempered chords]] tempered by the dakotisma, [[595/594]].  


Dakotismic chords are numerous. If we disallow intervals that are typically too small for harmonic use, in this case the semitones [[15/14]], [[18/17]], [[21/20]], and [[22/21]], there are four pairs of triads in inverse relationship in the 21-odd-limit:
Dakotismic chords are numerous, including 14 triads and 51 tetrads as 2.3.5.7.11.17 [[subgroup]] [[17-odd-limit]] essentially tempered chords.


* 1-6/5-17/11 with steps 6/5-9/7-22/17, and  
For triads, there are seven pairs of chords in inverse relationship:
* 1-22/17-5/3 with steps 22/17-9/7-6/5;
* 1-6/5-17/11 with steps 6/5-9/7-22/17 and its inverse 1-22/17-5/3 with steps 22/17-9/7-6/5;
* 1-7/6-22/17 with steps 7/6-10/9-17/11, and  
* 1-7/6-22/17 with steps 7/6-10/9-17/11 and its inverse 1-17/11-12/7 with steps 17/11-10/9-7/6;
* 1-17/11-12/7 with steps 17/11-10/9-7/6;
* 1-11/10-17/12 with steps 11/10-9/7-24/17 and its inverse 1-9/7-17/12 with steps 9/7-11/10-24/17;
* 1-11/10-17/12 with steps 11/10-9/7-24/17, and  
* 1-14/11-24/17 with steps 14/11-10/9-17/12 and its inverse 1-10/9-24/17 with steps 10/9-14/11-17/12;
* 1-9/7-17/12 with steps 9/7-11/10-24/17;  
* 1-9/7-15/11 with steps 9/7-18/17-22/15 and its inverse 1-9/7-17/9 with steps 9/7-22/15-18/17;
* 1-14/11-24/17 with steps 14/11-10/9-17/12, and  
* 1-11/7-5/3 with steps 11/7-18/17-6/5 and its inverse 1-11/7-17/9 with steps 11/7-6/5-18/17;
* 1-10/9-24/17 with steps 10/9-14/11-17/12.  
* 1-11/10-7/6 with steps 11/10-18/17-12/7 and its inverse 1-11/10-17/9 with steps 11/10-12/7-18/17.


If we allow the semitones, there are four additional pairs of triads in inverse relationship:
For tetrads, there are three palindromic chords and twenty-four pairs of chords in inverse relationship. The palindromic chords are
* 1-9/5-21/11 with steps 9/5-18/17-22/21, and its inverse
* 1-6/5-9/7-17/11 with steps 6/5-15/14-6/5-22/17;
* 1-9/5-17/9 with steps 9/5-22/21-18/17;  
* 1-18/17-9/7-15/11 with steps 18/17-17/14-18/17-22/15;
* 1-9/7-15/11 with steps 9/7-18/17-22/15, and its inverse
* 1-18/17-5/3-30/17 with steps 18/17-11/7-18/17-17/15.
* 1-9/7-17/9 with steps 9/7-22/15-18/17;  
* 1-11/7-5/3 with steps 11/7-18/17-6/5, and its inverse
* 1-11/7-17/9 with steps 11/7-6/5-18/17;
* 1-11/10-7/6 with steps 11/10-18/17-12/7, and its inverse
* 1-11/10-17/9 with steps 11/10-12/7-18/17.


For tetrads without the semitones, there are two pairs in inverse relationship:
The inversely related pairs of chords are
* 1-6/5-17/11-12/7 with steps 6/5-9/7-10/9-7/6, and its inverse
* 1-14/11-17/11-9/5 with steps 14/11-17/14-7/6-10/9 and its inverse 1-7/6-17/12-9/5 with steps 7/6-17/14-14/11-10/9;
* 1-7/6-22/17-5/3 with steps 7/6-10/9-9/7-6/5;  
* 1-6/5-17/11-12/7 with steps 6/5-9/7-10/9-7/6 and its inverse 1-7/6-22/17-5/3 with steps 7/6-10/9-9/7-6/5;
* 1-11/10-17/12-11/7 with steps 11/10-9/7-10/9-14/11, and its inverse
* 1-6/5-17/11-9/5 with steps 6/5-9/7-7/6-10/9 and its inverse 1-10/9-22/17-5/3 with steps 10/9-7/6-9/7-6/5;
* 1-14/11-24/17-20/11 with steps 14/11-10/9-9/7-11/10;  
* 1-9/7-17/12-11/7 with steps 9/7-11/10-10/9-14/11 and its inverse 1-14/11-24/17-14/9 with steps 14/11-10/9-11/10-9/7;
* 1-11/10-17/12-11/7 with steps 11/10-9/7-10/9-14/11 and its inverse 1-14/11-24/17-20/11 with steps 14/11-10/9-9/7-11/10;
* 1-11/10-17/12-17/10 with steps 11/10-9/7-6/5-20/17 and its inverse 1-6/5-17/11-17/10 with steps 6/5-9/7-11/10-20/17;
* 1-17/12-11/7-11/6 with steps 17/12-10/9-7/6-12/11 and its inverse 1-17/12-17/11-9/5 with steps 17/12-12/11-7/6-10/9;
* 1-22/17-5/3-11/6 with steps 22/17-9/7-11/10-12/11 and its inverse 1-11/10-17/12-11/6 with steps 11/10-9/7-22/17-12/11;
* 1-17/12-3/2-9/5 with steps 17/12-18/17-6/5-10/9 and its inverse 1-18/17-3/2-5/3 with steps 18/17-17/12-10/9-6/5;
* 1-9/7-15/11-3/2 with steps 9/7-18/17-11/10-4/3 and its inverse 1-11/10-7/6-3/2 with steps 11/10-18/17-9/7-4/3;
* 1-9/7-17/12-3/2 with steps 9/7-11/10-18/17-4/3 and its inverse 1-18/17-7/6-3/2 with steps 18/17-11/10-9/7-4/3;
* 1-11/10-17/12-3/2 with steps 11/10-9/7-18/17-4/3 and its inverse 1-18/17-15/11-3/2 with steps 18/17-9/7-11/10-4/3;
* 1-9/7-15/11-5/3 with steps 9/7-18/17-11/9-6/5 and its inverse 1-9/7-17/11-17/9 with steps 9/7-6/5-11/9-18/17;
* 1-9/7-15/11-18/11 with steps 9/7-18/17-6/5-11/9 and its inverse 1-9/7-11/7-17/9 with steps 9/7-11/9-6/5-18/17;
* 1-9/7-17/11-18/11 with steps 9/7-6/5-18/17-11/9 and its inverse 1-6/5-17/11-17/9 with steps 6/5-9/7-11/9-18/17;
* 1-6/5-14/9-17/9 with steps 6/5-22/17-17/14-18/17 and its inverse 1-17/14-11/7-17/9 with steps 17/14-22/17-6/5-18/17;
* 1-9/7-5/3-17/9 with steps 9/7-22/17-17/15-18/17 and its inverse 1-17/15-22/15-17/9 with steps 17/15-22/17-9/7-18/17;
* 1-6/5-17/10-17/9 with steps 6/5-17/12-10/9-18/17 and its inverse 1-10/9-11/7-17/9 with steps 10/9-17/12-6/5-18/17;
* 1-17/14-9/7-17/12 with steps 17/14-18/17-11/10-24/17 and its inverse 1-11/10-7/6-17/12 with steps 11/10-18/17-17/14-24/17;
* 1-10/7-11/7-5/3 with steps 10/7-11/10-18/17-6/5 and its inverse 1-10/7-12/7-20/11 with steps 10/7-6/5-18/17-11/10;
* 1-11/10-11/9-17/9 with steps 11/10-10/9-17/11-18/17 and its inverse 1-17/11-12/7-17/9 with steps 17/11-10/9-11/10-18/17;
* 1-10/9-12/7-17/9 with steps 10/9-17/11-11/10-18/17 and its inverse 1-11/10-17/10-17/9 with steps 11/10-17/11-10/9-18/17;
* 1-11/10-6/5-17/9 with steps 11/10-12/11-11/7-18/17 and its inverse 1-11/7-12/7-17/9 with steps 11/7-12/11-11/10-18/17;
* 1-15/14-9/7-15/11 with steps 15/14-6/5-18/17-22/15 and its inverse 1-18/17-14/11-15/11 with steps 18/17-6/5-15/14-22/15.


And if we use the semitones, there are many more. Some of these involve the perfect fifth:
Equal temperaments with dakotismic chords include {{Optimal ET sequence|12, 14c, 15g, 19eg, 22, 26, 27eg, 31g, 41, 46, 50, 58, 72, 94, 118, 121, 140, 239 and 311}}.
* 1-3/2-9/5-21/11 with steps 3/2-6/5-18/17-22/21, and its inverse
* 1-3/2-11/7-5/3 with steps 3/2-22/21-18/17-6/5;
* 1-9/7-15/11-3/2 with steps 9/7-18/17-11/10-4/3, and its inverse
* 1-11/10-7/6-3/2 with steps 11/10-18/17-9/7-4/3;
* 1-9/7-17/12-3/2 with steps 9/7-11/10-18/17-4/3, and its inverse
* 1-18/17-7/6-3/2 with steps 18/17-11/10-9/7-4/3.
* 1-11/10-17/12-3/2 with steps 11/10-9/7-18/17-4/3, and its inverse
* 1-18/17-15/11-3/2 with steps 18/17-9/7-11/10-4/3.  


Others do not:
[[Category:17-odd-limit]]
* 1-7/5-9/5-21/11 with steps 7/5-9/7-18/17-22/21, and its inverse
* 1-7/5-22/15-14/9 with steps 7/5-22/21-18/17-9/7;
* 1-10/7-11/7-5/3 with steps 10/7-11/10-18/17-6/5, and its inverse
* 1-10/7-12/7-20/11 with steps 10/7-6/5-18/17-11/10;
* 1-18/11-9/5-21/11 with steps 18/11-11/10-18/17-22/21, and its inverse
* 1-18/11-12/7-20/11 with steps 18/11-22/21-18/17-11/10;
* 1-9/7-15/11-18/11 with steps 9/7-18/17-6/5-11/9, and its inverse
* 1-6/5-14/11-18/11 with steps 6/5-18/17-9/7-11/9;
* 1-17/14-9/7-17/12 with steps 17/14-18/17-11/10-24/17, and its inverse
* 1-11/10-7/6-17/12 with steps 11/10-18/17-17/14-24/17;
* 1-11/10-6/5-17/9 with steps 11/10-12/11-11/7-18/17, and its inverse
* 1-11/7-12/7-17/9 with steps 11/7-12/11-11/10-18/17;
 
The following two tetrads are palindromic:
* 1-18/17-7/6-21/17 with steps 18/17-11/10-18/17-34/21;
* 1-18/17-5/3-30/17 with steps 18/17-11/7-18/17-17/15.
 
For pentads, there are at least six pairs in inverse relationship, all featuring the fifth and using the semitones:
* 1-3/2-18/11-9/5-21/11 with steps 3/2-12/11-11/10-18/17-22/21, and its inverse
* 1-3/2-11/7-5/3-11/6 with steps 3/2-22/21-18/17-11/10-12/11;
* 1-7/5-3/2-9/5-21/11 with steps 7/5-15/14-6/5-18/17-22/21, and its inverse
* 1-15/14-3/2-11/7-5/3 with steps 15/14-7/5-22/21-18/17-6/5;
* 1-9/7-15/11-3/2-18/11 with steps 9/7-18/17-11/10-12/11-11/9, and its inverse
* 1-11/10-7/6-3/2-11/6 with steps 11/10-18/17-9/7-11/9-12/11;
* 1-11/10-17/12-3/2-11/7 with steps 11/10-9/7-18/17-22/21-14/11, and its inverse
* 1-18/17-15/11-3/2-21/11 with steps 18/17-9/7-11/10-14/11-22/21;
* 1-9/7-15/11-10/7-3/2 with steps 9/7-18/17-22/21-21/20-4/3, and its inverse
* 1-21/20-11/10-7/6-3/2 with steps 21/20-22/21-18/17-9/7-4/3;
* 1-17/14-9/7-17/12-3/2 with steps 17/14-18/17-11/10-18/17-4/3, and its inverse
* 1-18/17-7/6-21/17-3/2 with steps 18/17-11/10-18/17-17/14-4/3;
 
[[Category:21-odd-limit]]
[[Category:Essentially tempered chords]]
[[Category:Essentially tempered chords]]
[[Category:Triads]]
[[Category:Triads]]
[[Category:Tetrads]]
[[Category:Tetrads]]
[[Category:Pentads]]
[[Category:Dakotismic]]
[[Category:Dakotismic]]