Sensi extensions: Difference between revisions
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[[Sensi]] has multiple competing [[extension]]s to the [[11-limit]]. The simplest [[7-limit]] [[comma]]s of sensi are [[126/125|starling (126/125)]] and [[245/243|sensamagic (245/243)]], and it can be viewed as the merge of the two corresponding [[rank-3 temperament]]s. These rank-3 temperaments are associated with distinct paths to the 11-limit. On one hand, [[starling]] strongly suggests tempering out [[176/175]], leading to thrush ({{nowrap|{126/125, 176/175}}}), since {{nowrap|126/125 {{=}} (176/175)(441/440)}}. On the other, [[sensamagic]] strongly suggests tempering out [[385/384]], leading to undecimal sensamagic ({{nowrap|{245/243, 385/384}}}), since {{nowrap|245/243 {{=}} (385/384)(896/891)}}. Taking either path for sensi leads us to one of the following entries: | [[Sensi]] has multiple competing [[extension]]s to the [[11-limit]]. The simplest [[7-limit]] [[comma]]s of sensi are [[126/125|starling (126/125)]] and [[245/243|sensamagic (245/243)]], and it can be viewed as the merge of the two corresponding [[rank-3 temperament]]s. These rank-3 temperaments are associated with distinct paths to the 11-limit. On one hand, [[starling]] strongly suggests tempering out [[176/175]], leading to thrush ({{nowrap|{126/125, 176/175}}}), since {{nowrap|126/125 {{=}} (176/175)(441/440)}}. On the other, [[sensamagic]] strongly suggests tempering out [[385/384]], leading to undecimal sensamagic ({{nowrap|{245/243, 385/384}}}), since {{nowrap|245/243 {{=}} (385/384)(896/891)}}. Taking either path for sensi leads us to one of the following entries: | ||
* '''Sensor''' (19 & | * '''Sensor''' (19 & 27) – tempering out 126/125, 245/243, and 385/384 | ||
* '''Sensus''' (19e & | * '''Sensus''' (19e & 27e) – tempering out 126/125, 176/175, and 245/243 | ||
The two unite in [[46edo|46et]], where both 176/175 and 385/384, as well as their sum, [[121/120]], are tempered out. They can be extended to the 13- and 17-limit naturally by adding [[91/90]] and [[154/153]] to the comma list in this order. Then the generator represents [[9/7]], [[13/10]], and [[22/17]]. | The two unite in [[46edo|46et]], where both 176/175 and 385/384, as well as their sum, [[121/120]], are tempered out. They can be extended to the 13- and 17-limit naturally by adding [[91/90]] and [[154/153]] to the comma list in this order. Then the generator represents [[9/7]], [[13/10]], and [[22/17]]. | ||
In addition, there are some low-complexity low-accuracy entries: | In addition, there are some low-complexity low-accuracy entries: | ||
* '''Sensis''' (19 & | * '''Sensis''' (19 & 27e) – tempering out 56/55, 100/99, and 245/243 | ||
* '''Sensa''' (19e & | * '''Sensa''' (19e & 27) – tempering out 55/54, 77/75, and 99/98 | ||
Another possible path which relates a sense of compromise is to temper out [[121/120]], leading to bisensi. This has the effect of slicing the octave in two, and is supported by [[38edo|38df]], 46, and [[54edo|54c]]. | Another possible path which relates a sense of compromise is to temper out [[121/120]], leading to bisensi. This has the effect of slicing the octave in two, and is supported by [[38edo|38df]], 46, and [[54edo|54c]]. | ||
See [[Sensipent family #Sensor]], [[Sensipent family #Sensus|#Sensus]], [[Sensipent family #Sensis|#Sensis]], and [[Sensipent family #Sensa|#Sensa]] for technical data. | |||
== Interval chain == | == Interval chain == | ||
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{| class="wikitable right-1 right-2" | {| class="wikitable right-1 right-2" | ||
|- | |- | ||
! rowspan="2" | | ! rowspan="2" | # | ||
! rowspan="2" | Cents* | ! rowspan="2" | Cents* | ||
! colspan="5" | Approximate | ! colspan="5" | Approximate ratios | ||
|- | |- | ||
! Sensi | ! Sensi | ||
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| | | | ||
|} | |} | ||
<nowiki />* In 2.3.5.7.13.17/11 subgroup CTE tuning | <nowiki/>* In 2.3.5.7.13.17/11 subgroup CTE tuning | ||
== Tuning spectra == | == Tuning spectra == | ||
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{| class="wikitable center-all left-4" | {| class="wikitable center-all left-4" | ||
|- | |- | ||
! Edo<br | ! Edo<br>generators | ||
! [[Eigenmonzo|Eigenmonzo<br | ! [[Eigenmonzo|Eigenmonzo<br>(unchanged-interval)]]* | ||
! Generator (¢) | ! Generator (¢) | ||
! Comments | ! Comments | ||
| Line 451: | Line 453: | ||
{| class="wikitable center-all left-4" | {| class="wikitable center-all left-4" | ||
|- | |- | ||
! Edo<br | ! Edo<br>generators | ||
! Eigenmonzo<br | ! Eigenmonzo<br>(unchanged-interval)* | ||
! Generator (¢) | ! Generator (¢) | ||
! Comments | ! Comments | ||
| Line 601: | Line 603: | ||
| | | | ||
|} | |} | ||
<nowiki />* Besides the octave | <nowiki/>* Besides the octave | ||
=== Sensus === | === Sensus === | ||
{| class="wikitable center-all left-4" | {| class="wikitable center-all left-4" | ||
|- | |- | ||
! Edo<br | ! Edo<br>generators | ||
! Eigenmonzo<br | ! Eigenmonzo<br>(unchanged-interval)* | ||
! Generator (¢) | ! Generator (¢) | ||
! Comments | ! Comments | ||
| Line 761: | Line 763: | ||
{| class="wikitable center-all left-4" | {| class="wikitable center-all left-4" | ||
|- | |- | ||
! Edo<br | ! Edo<br>generators | ||
! Eigenmonzo<br | ! Eigenmonzo<br>(unchanged-interval)* | ||
! Generator (¢) | ! Generator (¢) | ||
! Comments | ! Comments | ||