21/13: Difference between revisions
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'''21/13''', the '''tridecimal supraminor sixth''', is ''ca''. 830 [[cent]]s in size. It has a very good approximation in [[13edo]]. | '''21/13''', the '''tridecimal supraminor sixth''', is ''ca''. 830 [[cent]]s in size. It has a very good approximation in [[13edo]]. | ||
This interval is a ratio of two consecutive Fibonacci numbers, therefore it approximates the [[golden ratio]]. In this case, 21/13 is ~2.8 [[cent|¢]] flat of the golden ratio. | This interval is a ratio of two consecutive Fibonacci numbers, therefore it approximates the [[golden ratio]], specifically [[acoustic phi]]. In this case, 21/13 is ~2.8 [[cent|¢]] flat of the golden ratio. | ||
== See also == | == See also == | ||