1573/1568: Difference between revisions

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{{Infobox Interval
{{Infobox Interval
| Ratio = 1573/1568
| Monzo = -5 0 0 -2 2 1
| Cents = 5.51173
| Name = lambeth comma
| Name = lambeth comma
| Color name =  
| Color name = 3o1oorr-2, thobiloru negative 2nd
| FJS name =
| Comma = yes
| Sound =  
}}
}}
'''1573/1568''', the '''lambeth comma''', is a [[13-limit]] (or 2.7.11.13 subgroup) [[small comma]] measuring about 5.5 [[cent]]s. It is the amount by which a stack of two [[14/11]]'s falls short of [[13/8]].  
'''1573/1568''', the '''lambeth comma''', is a [[13-limit]] (or 2.7.11.13 subgroup) [[small comma]] measuring about 5.5 [[cent]]s. It is the amount by which a stack of two [[14/11]]'s falls short of [[13/8]].  


The name comes from the place where [[Flora Canou]] dwelled when she named the comma in January 2022.  
== Temperaments ==
Tempering it out leads to a form of the '''lambeth temperament''', and enables [[lambeth chords]], the [[essentially tempered chord]]s in the [[13-odd-limit]].  
 
[[Subgroup]]: 2.3.5.7.11.13
 
[[Mapping]]: <br>
{| class="right-all"
|-
| [⟨ || 1 || 0 || 0 || 0 || 0 || 5 || ],
|-
| ⟨ || 0 || 1 || 0 || 0 || 0 || 0 || ],
|-
| ⟨ || 0 || 0 || 1 || 0 || 0 || 0 || ],
|-
| ⟨ || 0 || 0 || 0 || 1 || 0 || 2 || ],
|-
| ⟨ || 0 || 0 || 0 || 0 || 1 || -2 || ]]
|}


== Temperaments ==
: mapping generators: ~2, ~3, ~5, ~7, ~11
Tempering it out leads to a form of the '''lambeth temperament''', and enables [[lambeth chords]], the [[essentially tempered chords]] in the [[13-odd-limit]].  
 
[[Optimal tuning]] ([[CTE]]): ~2 = 1\1, ~3/2, ~5/4, ~7/4 = 969.7592, ~11/8 = 549.9007, ~13/8 = 839.7169
 
{{Optimal ET sequence|legend=1| 17c, 22f, 26, 29, 31, 43, 46, 60e, 63, 68, 72, 103, 111, 140, 183, 212, 243e, 315ef, 323, 395f, 426e, 638eef }}
 
== Etymology ==
The lambeth comma was named by [[Flora Canou]] in January 2022, referring to the [[Wikipedia: London Borough of Lambeth|London Borough of Lambeth]], where she dwelled at the time.  


== See also ==
== See also ==
* [[Small comma]]
* [[Small comma]]


[[Category:13-limit]]
[[Category:Small comma]]
[[Category:Lambeth]]
[[Category:Lambeth]]
[[Category:Commas named after place names]]