User:Dave Keenan/sandbox: Difference between revisions
Dave Keenan (talk | contribs) No edit summary |
Dave Keenan (talk | contribs) |
||
Line 4: | Line 4: | ||
[[Chain-of-fifths_notation#Accidentals|Stein-Zimmermann notation]] can be viewed as a very simple apotome-fraction notation, only capable of notating half-apotomes. | [[Chain-of-fifths_notation#Accidentals|Stein-Zimmermann notation]] can be viewed as a very simple apotome-fraction notation, only capable of notating half-apotomes. | ||
On 24-Sep-2016 in the Facebook Group: Microtonal Music and Tuning Theory, [[ | On 24-Sep-2016 in the Facebook Group: Microtonal Music and Tuning Theory, [[Cryptic Ruse]] introduced [[https://www.facebook.com/groups/497105067092502/permalink/840445019425170/|a combination of apotome-fraction and limma-fraction notations]] to cover all EDOs up to 72. | ||
When the EDO has fifths so wide that the limma becomes very small or negative (e.g. 32-EDO), an apotome-fraction notation must be used. When the EDO has fifths so narrow that the apotome becomes very small or negative (e.g. 33-EDO), limma-fraction notations must be used. | When the EDO has fifths so wide that the limma becomes very small or negative (e.g. 32-EDO), an apotome-fraction notation must be used. When the EDO has fifths so narrow that the apotome becomes very small or negative (e.g. 33-EDO), limma-fraction notations must be used. | ||
Although | Although Cryptic Ruse later abandoned these notations, the principle was adopted by George Secor and Dave Keenan for the notation of EDOs with bad fifths, where a bad fifth is defined as one with an error of more than 10 cents (check this). | ||
== Apotome-fraction notations == | == Apotome-fraction notations == |