243/242: Difference between revisions
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== Temperament == | == Temperament == | ||
Tempering it out leads to a form of [[rastmic temperament]], or in the 2.3.11 subgroup, the [[Subgroup temperaments #Neutral|neutral]] temperament, enabling [[ | Tempering it out leads to a form of [[rastmic temperament]], enabling [[rastmic chords]], or in the 2.3.11 subgroup, the [[Subgroup temperaments #Neutral|neutral]] temperament, enabling [[Neutral tetrad|neutral chords]]. | ||
== See also == | == See also == | ||
Revision as of 14:22, 16 March 2021
| Interval information |
neutral third comma
reduced
243/242, the rastma or the neutral third comma, is an 11-limit (also 2.3.11 subgroup) comma with a value of roughly 7.1 cents. It is significant in Just Intonation as the amount by which a stack of two 33/32 quartertones falls short of an apotome (2187/2048) as well as the difference between 11/9 and 27/22, and, the difference between 45/44 and 55/54. The last makes the theory where the rastma serves as the subchroma that separates greater and lesser 11-limit chromas – a property that becomes especially apparent when one works extensively with the 11-limit.
Temperament
Tempering it out leads to a form of rastmic temperament, enabling rastmic chords, or in the 2.3.11 subgroup, the neutral temperament, enabling neutral chords.