Prime interval: Difference between revisions

Xenwolf (talk | contribs)
seems not to be fully elaborated yet
Xenwolf (talk | contribs)
absolutely makes sense, but should be further elaborated
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:''<tt>"Proposal", see [[#Open questions]]</tt>''
A '''prime interval''' or '''primary interval''' is a musical interval which as a ratio of frequencies is a [[prime number]]; that is, a number such as 2, 3, 5, 7, 11, ... which is divisible only by itself and 1. Any musical interval in the [[p-limit]] can be expressed in terms of a product of prime numbers less than or equal to p.  
A '''prime interval''' is a musical interval which as a ratio of frequencies is a [[prime number]]; that is, a number such as 2, 3, 5, 7, ... which is divisible only by itself and 1. Any musical interval in the [[p-limit]] can be expressed in terms of a product of prime numbers less than or equal to p.


The prime intervals are [[2/1]], [[1/2]], [[3/1]], [[1/3]], [[5/1]], [[1/5]], [[7/1]], etc.
For example, the [[octave]] is a prime interval whereas the intervals [[5/3]] or even [[1/1]] are not. In traditional ratio notation, the prime intervals are [[2/1]], [[3/1]], [[5/1]], [[7/1]], [[11/1]] etc.
The interval [[5/3]], for example, is not considered a prime interval.


== Open questions ==
The [[monzo]] notation of each prime interval has only one <code>1</code> entry: (2 = {{monzo|1}}, 3 = {{monzo|0 1}}, 5 = {{monzo|0 0 1}}, 7 = {{monzo|0 0 0 1}}, 11 = {{monzo|0 0 0 0 1}}, ...)
 
* What about [[1/1]]?
* What about [[octave equivalence]]?


== See also ==
== See also ==


* [[Octave]]
* [[Patent val]]
* [[Consistency]]
* [[Prime harmonic series]]
* [[Prime harmonic series]]
        
        
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[[Category:Todo:review]]
[[Category:Todo:review]]
[[Category:Todo:expand]]