Cuthbert chords: Difference between revisions

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'''Cuthbert chords''' are [[essentially tempered dyadic chord]]s tempered by the cuthbert comma, [[847/845]].  
'''Cuthbert chords''' are [[essentially tempered dyadic chord]]s tempered by the cuthbert comma, [[847/845]].  


The most typical cuthbert triad is a palindrome in the 2.5.7.11.13 [[subgroup]] [[13-odd-limit]], consisting of two [[13/11]]'s making up [[7/5]], which implies tempering by cuthbert, the 847/845 comma. It is, in other words, the 847/845-tempered version of  
Cuthbert chords are of [[Dyadic chord/Pattern of essentially tempered chords|pattern 1a]] in the 2.5.7.11.13 [[subgroup]] [[13-odd-limit]], meaning that there are 3 triads, 6 tetrads and 2 pentads, for a total of 11 distinct chord structures.
 
The most basic cuthbert triad is a palindrome, consisting of two [[13/11]]'s making up [[7/5]], which implies tempering by cuthbert, the 847/845 comma. It is, in other words, the 847/845-tempered version of  
* 1-13/11-7/5 with steps 13/11-13/11-10/7.  
* 1-13/11-7/5 with steps 13/11-13/11-10/7.  


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* 1-14/13-13/11 with steps 14/13-11/10-22/13.  
* 1-14/13-13/11 with steps 14/13-11/10-22/13.  


They can be extended to the following tetrads, with two palindromic chords and two pairs of chords in inverse relationship. The palindromic chords are  
They can be extended to the following tetrads, with two palindromic chords and two pairs of chords in inverse relationship. The palindromic tetrads are  
* 1-11/10-13/11-13/10 chord with steps 11/10-14/13-11/10-20/13;
* 1-11/10-13/11-13/10 chord with steps 11/10-14/13-11/10-20/13;
* 1-14/13-13/11-14/11 chord with steps 14/13-11/10-14/13-11/7.
* 1-14/13-13/11-14/11 chord with steps 14/13-11/10-14/13-11/7.


The inversely related pairs of chords are
The inversely related pairs of tetrads are
* 1-13/11-14/11-7/5 with steps 13/11-14/13-11/10-10/7, and its inverse  
* 1-13/11-14/11-7/5 with steps 13/11-14/13-11/10-10/7, and its inverse  
* 1-11/10-13/11-7/5 with steps 11/10-14/13-13/11-10/7;  
* 1-11/10-13/11-7/5 with steps 11/10-14/13-13/11-10/7;  
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* 1-14/13-13/11-7/5 with steps 14/13-11/10-13/11-10/7.  
* 1-14/13-13/11-7/5 with steps 14/13-11/10-13/11-10/7.  


Then there are two inversely related pentads:  
Then there is an inversely related pair of pentads:  
* 1-11/10-13/11-13/10-7/5 with steps 11/10-14/13-11/10-14/13-10/7, and its inverse  
* 1-11/10-13/11-13/10-7/5 with steps 11/10-14/13-11/10-14/13-10/7, and its inverse  
* 1-14/13-13/11-14/11-7/5 with steps 14/13-11/10-14/13-11/10-10/7.  
* 1-14/13-13/11-14/11-7/5 with steps 14/13-11/10-14/13-11/10-10/7.