Alpharabian tuning: Difference between revisions

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* Generally, intervals that result that result from the modification of a Pythagorean interval by 1331/1296 take both the 'ultra' or 'infra' prefixes along with the "semilimmic" modifier before the word with the prefix, since 1331/1296 is the chromatic half of a Pythagorean Limma, however, there are some significant caveats...

:* Augmentation of a Pythagorean Minor interval by a single 1331/1296 results in a Supraminor interval, but a second such augmentation results in a Class IV Alpharabian Major interval due to said interval differing from the nearby Class II Alpharabian Major (covered under modifications by 1089/1024) by a rastma.

:* Augmentation of a Pythagorean Minor interval by a single 1331/1296 results in a semilimmic Supraminor interval, but a second such augmentation results in a Class IV Alpharabian Major interval due to said interval differing from the nearby Class II Alpharabian Major (covered under modifications by 1089/1024) by a rastma.

:* Diminution of a Pythagorean Major interval by a single 1331/1296 results in a Submajor interval, but a second such diminution results in a Class IV Alpharabian Minor interval due to said interval differing from the nearby Class II Alpharabian Minor (covered under modifications by 1089/1024) by a rastma.

:* Diminution of a Pythagorean Major interval by a single 1331/1296 results in a semilimmic Submajor interval, but a second such diminution results in a Class IV Alpharabian Minor interval due to said interval differing from the nearby Class II Alpharabian Minor (covered under modifications by 1089/1024) by a rastma.

== Important intervals ==

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 * Generally, intervals that result that result from the modification of a Pythagorean interval by 1331/1296 take both the 'ultra' or 'infra' prefixes along with the "semilimmic" modifier before the word with the prefix, since 1331/1296 is the chromatic half of a Pythagorean Limma, however, there are some significant caveats...
-:* Augmentation of a Pythagorean Minor interval by a single 1331/1296 results in a Supraminor interval, but a second such augmentation results in a Class IV Alpharabian Major interval due to said interval differing from the nearby Class II Alpharabian Major (covered under modifications by 1089/1024) by a rastma.
+:* Augmentation of a Pythagorean Minor interval by a single 1331/1296 results in a semilimmic Supraminor interval, but a second such augmentation results in a Class IV Alpharabian Major interval due to said interval differing from the nearby Class II Alpharabian Major (covered under modifications by 1089/1024) by a rastma.
-:* Diminution of a Pythagorean Major interval by a single 1331/1296 results in a Submajor interval, but a second such diminution results in a Class IV Alpharabian Minor interval due to said interval differing from the nearby Class II Alpharabian Minor (covered under modifications by 1089/1024) by a rastma.
+:* Diminution of a Pythagorean Major interval by a single 1331/1296 results in a semilimmic Submajor interval, but a second such diminution results in a Class IV Alpharabian Minor interval due to said interval differing from the nearby Class II Alpharabian Minor (covered under modifications by 1089/1024) by a rastma.
 == Important intervals ==