Frameshift comma: Difference between revisions

Aura (talk | contribs)
No edit summary
Various cleanup
 
Line 5: Line 5:
| Comma = yes
| Comma = yes
}}
}}
The '''frameshift comma''' is an [[unnoticeable comma|unnoticeable]] [[11-limit]] (2.3.11) comma. It is the difference between:  
The '''frameshift comma''' is an [[unnoticeable comma|unnoticeable]] [[11-limit]] (2.3.11) comma. It is the difference between:  
* Four [[Pythagorean apotome]]s and [[1331/1024]];
* The [[243/242|rastma]] and the [[pythrabian comma]];
* The [[gamelisma]] and three [[symbiotic comma]]s.


* 4 [[Apotome|apotomes]] and [[1331/1024]]
== Temperaments ==
* The [[243/242|rastma]] and the [[pythrabian comma]]
[[File:Frameshift Cadence.mp3|thumb|Frameshift progression sample in [[159edo]].]]
* The [[gamelisma]] and 3 [[Symbiotic comma|symbiotic commas]]
[[File:Frameshift Cadence Score.png|thumb|Score for the above sample of the Frameshift progression in 159edo.]]


== Temperaments ==
Tempering out this comma results in the [[frameshift]] temperament in the 2.3.11. This allows reaching [[11/8]] by a stepwise motion consisting of four apotomes and one [[128/121]] with astoundingly small error. [[Aura]] dubs this the ''frameshift progression'' (see below).
Tempering out this comma results in the [[frameshift]] temperament in the 2.3.11. This allows reaching [[11/8]] by a stepwise motion consisting of four apotomes and one [[128/121]] with astoundingly small error. [[Aura]] dubs this the '''frameshift progression''' (see below).


It also splits the fifth into three 22528/19683's – an interval sharp of [[8/7]] by the [[symbiotic comma]]. Naturally, tempering it out results in a [[slendric]] extension.
It also splits the fifth into three 22528/19683's – an interval sharp of [[8/7]] by the [[symbiotic comma]]. Naturally, tempering it out results in a [[slendric]] extension. If both rastma and pythrabian comma are tempered out, this results in [[41edo]] – a trivial tuning of frameshift.
If both rastma and pythrabian comma are tempered out, this results in [[41edo]] – a trivial tuning of frameshift.


== Etymology ==
== Etymology ==
Discovered by Aura in 2021, it comes from the fact that both the [[rastmic]] and [[pythrabian]] temperaments are ways of conceptualizing how the 11-prime relates to the 3-prime, these two frameworks for viewing the 11-prime relative to the 3-prime become linked when this comma is tempered out – hence the name "frameshift" comma.[[File:Frameshift Cadence.mp3|thumb|Frameshift progression sample in [[159edo]].]]
Discovered by Aura in 2021, it comes from the fact that both the [[rastmic]] and [[pythrabian]] temperaments are ways of conceptualizing how the 11-prime relates to the 3-prime, these two frameworks for viewing the 11-prime relative to the 3-prime become linked when this comma is tempered out – hence the name "frameshift" comma.
 
[[File:Frameshift Cadence Score.png|thumb|Score for the above sample of the Frameshift progression in 159edo.]]
 
== See also ==
* [[Unnoticeable comma]]
* [[Frameshift microtemperaments]]


[[Category:Alpharabian]]
[[Category:Alpharabian]]