Compton: Difference between revisions

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Assuming one has chosen to approximate the 7-limit, the comma generator will be around 15–17 cents. This means that the [[11/1|11th harmonic]] can be reached either by going up or down three steps. Going down three steps results in the canonical extension of compton. Stepping down one more comma, depending on the tuning, can lead to the [[13/1|13th harmonic]], and results in the canonical tridecimal compton. This works best with tunings of the comma around 15 cents.

Alternatively, any prime may be merged into its 12edo mapping, making the smallest available prime the generator. This is done in [[catler]] (which shares 12edo's 5-limit and is generated by 7) and [[duodecim]] (which shares 12edo's 7-limit and is generated by 11). This is a natural choice for 17 and 19, as 12edo tunes those primes especially well, so compton can be seen as a 19-limit temperament. The next step down, which ends up at around 75 cents flat of the corresponding 12edo interval, can be used for 23 and 29, though two steps up (30 ~~steps~~ sharp) is also a reasonable (but less intuitive) choice.

Alternatively, any prime may be merged into its 12edo mapping, making the smallest available prime the generator. This is done in [[catler]] (which shares 12edo's 5-limit and is generated by 7) and [[duodecim]] (which shares 12edo's 7-limit and is generated by 11). This is a natural choice for 17 and 19, as 12edo tunes those primes especially well, so compton can be seen as a 19-limit temperament. The next step down, which ends up at around 75 cents flat of the corresponding 12edo interval, can be used for 23 and 29, though two steps up (30 cents sharp) is also a reasonable (but less intuitive) choice.

== Interval chain ==

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 Assuming one has chosen to approximate the 7-limit, the comma generator will be around 15–17 cents. This means that the [[11/1|11th harmonic]] can be reached either by going up or down three steps. Going down three steps results in the canonical extension of compton. Stepping down one more comma, depending on the tuning, can lead to the [[13/1|13th harmonic]], and results in the canonical tridecimal compton. This works best with tunings of the comma around 15 cents.
-Alternatively, any prime may be merged into its 12edo mapping, making the smallest available prime the generator. This is done in [[catler]] (which shares 12edo's 5-limit and is generated by 7) and [[duodecim]] (which shares 12edo's 7-limit and is generated by 11). This is a natural choice for 17 and 19, as 12edo tunes those primes especially well, so compton can be seen as a 19-limit temperament. The next step down, which ends up at around 75 cents flat of the corresponding 12edo interval, can be used for 23 and 29, though two steps up (30 steps sharp) is also a reasonable (but less intuitive) choice.
+Alternatively, any prime may be merged into its 12edo mapping, making the smallest available prime the generator. This is done in [[catler]] (which shares 12edo's 5-limit and is generated by 7) and [[duodecim]] (which shares 12edo's 7-limit and is generated by 11). This is a natural choice for 17 and 19, as 12edo tunes those primes especially well, so compton can be seen as a 19-limit temperament. The next step down, which ends up at around 75 cents flat of the corresponding 12edo interval, can be used for 23 and 29, though two steps up (30 cents sharp) is also a reasonable (but less intuitive) choice.
 == Interval chain ==