13edo scales: Difference between revisions

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Generated by 3\13, the 276.9-cent minor third approximating [[13/11]], this scale sounds a little like the octatonic scale in 12edo with an extra small step inserted. Two of these make an 11/8 and three make a 13/8, making this scale very good for 4:11:13 triads. (In terms of regular temperament theory, this makes 13edo a tuning for the [[Color notation|bithotrilu]] temperament that tempers out the bithotrilu comma 1352/1331 = {{monzo|3 0 0 0 -3 2}}, aka "lovecraft temperament".) [[17edo]] also supports a similar 4L 5s scale, generated by the 4\17 minor third, that tempers out the same comma. [[Orwell|Similar scales]] also exist in 22edo and 31edo with flatter generators, but they won't approximate the 13th harmonic.

The brightest mode is 0-2-3-5-6-8-9-11-12-13; you get 4:11:13 on degrees 1, 2, 3, 5, 7 and 9; these can be extended to either 8:10:11:13:17 or 4:9:11:13:21 depending on what degree you're on. Since you get 21/16 as the minor version of 11/8, you also get two 8:13:17:21's with the same interval classes, on degrees 6 and 8. Degree 4 has a 4:5:11.

The brightest mode is 0-2-3-5-6-8-9-11-12-13; you get 4:11:13 on degrees 1, 2, 3, 5, 7 and 9; these can be extended to either 4:10:11:13:17 or 4:9:11:13:21 depending on what degree you're on. Since you get 21/16 as the minor version of 11/8, you also get two 8:13:17:21's with the same interval classes, on degrees 6 and 8. Degree 4 has a 4:5:11.

===Musical examples===

[https://www.youtube.com/watch?v=x4Yesl8n6gc Brusselator Sprouts (by Xotla)] (The main riffs are in this scale, although key changes and notes outside the 9 note subset are used too.)

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 Generated by 3\13, the 276.9-cent minor third approximating [[13/11]], this scale sounds a little like the octatonic scale in 12edo with an extra small step inserted. Two of these make an 11/8 and three make a 13/8, making this scale very good for 4:11:13 triads. (In terms of regular temperament theory, this makes 13edo a tuning for the [[Color notation|bithotrilu]] temperament that tempers out the bithotrilu comma 1352/1331 = {{monzo|3 0 0 0 -3 2}}, aka "lovecraft temperament".) [[17edo]] also supports a similar 4L 5s scale, generated by the 4\17 minor third, that tempers out the same comma. [[Orwell|Similar scales]] also exist in 22edo and 31edo with flatter generators, but they won't approximate the 13th harmonic.
-The brightest mode is 0-2-3-5-6-8-9-11-12-13; you get 4:11:13 on degrees 1, 2, 3, 5, 7 and 9; these can be extended to either 8:10:11:13:17 or 4:9:11:13:21 depending on what degree you're on. Since you get 21/16 as the minor version of 11/8, you also get two 8:13:17:21's with the same interval classes, on degrees 6 and 8. Degree 4 has a 4:5:11.
+The brightest mode is 0-2-3-5-6-8-9-11-12-13; you get 4:11:13 on degrees 1, 2, 3, 5, 7 and 9; these can be extended to either 4:10:11:13:17 or 4:9:11:13:21 depending on what degree you're on. Since you get 21/16 as the minor version of 11/8, you also get two 8:13:17:21's with the same interval classes, on degrees 6 and 8. Degree 4 has a 4:5:11.
 ===Musical examples===
 [https://www.youtube.com/watch?v=x4Yesl8n6gc Brusselator Sprouts (by Xotla)] (The main riffs are in this scale, although key changes and notes outside the 9 note subset are used too.)