Systematic comma names explained: Difference between revisions
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=== 11-3/5 comma, 45-7/5 comma, etc. === | === 11-3/5 comma, 45-7/5 comma, etc. === | ||
These are the same type of name as above, but they involve stacks of intervals that are not octave reduced harmonics. For example 7/4 is an octave reduced harmonic, so a comma tempering a stack of those would be an | These are the same type of name as above, but they involve stacks of intervals that are not octave reduced harmonics. For example '''7/4''' is an octave reduced harmonic, so a comma tempering a stack of those would be an '''n-7''' comma, but '''7/5''' is ''not'' a reduced harmonic, so a comma tempering a stack of those would be an '''n-7/5''' comma rather than just n-7. | ||
An interval with a bigger denominator than numerator, like 3/5, indicates a negative interval. 3/5 for example is about -884 cents. A comma can still temper a stack of these. Just imagine it like a stack of 5/3s but going down instead of up. (In an EDO, intervals that go down still wrap back around every octave, so this is possible.) | An interval with a bigger denominator than numerator, like 3/5, indicates a negative interval. 3/5 for example is about -884 cents. A comma can still temper a stack of these. Just imagine it like a stack of 5/3s but going down instead of up. (In an EDO, intervals that go down still wrap back around every octave, so this is possible.) | ||