Bastille: Difference between revisions

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Theory: oops that was fourth and not fifth
Proposal declined. Temperament-agnostic name and temperament name should never be identical
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'''Bastille''' is a loose term describing a rank-2 temperament (or alternately, a rank-2 scale) produced by temperament-merging [[1407edo]] and [[1789edo]]. It derives its name from the fact that the storming of Bastille happened on 14 July 1789, which in date format is written as 14/07/1789.
'''Bastille''' is a sequence of [[mos scale]]s supported by [[1407edo]] and [[1789edo]]. It derives its name from the fact that the storming of Bastille happened on 14 July 1789, which in date format is written as 14/07/1789.


The defining characterstic of Bastille across different vals and branchings is that the generator is a "meantone" flat fifth of around 694.5 cents, and fifteen of them when stacked reach [[5/4]]. Such a characteristic is quite remarkable for edos in the thousands to support.
The defining characterstic of Bastille is that the generator is a "meantone" flat fifth of around 694.5 cents. Such a characteristic is quite remarkable for edos in the thousands to support.


== Theory ==
== Theory ==
Since 1407edo is inconsistent in the 13-limit, and 1789edo is a dual-fifth system, Eliora proposes that the term ''bastille'' refer collectively to all temperaments created from vals and branchings which are supported by 1407edo and 1789edo, as different vals have different features and advantages.
The [[The Jacobins #Pure Bastille|1407eff & 1789 temperament]], named ''pure bastille'', tempers out the [[jacobin comma]], which brings two great French Revolution terms in one temperament. However, from a just intonation perspective, such temperament may be too complex, even for edos in the thousands. On the other hand, taking patent vals of 1407edo and 1789edo in the full 13-limit produces a temperament whose fifth is mapped to [[112/75]], a relatively simple interval on this scale. Comma basis for this version of bastille is {384912/384475, 41765625/41746432, 4501875/4499456, 540078539/540000000}.
 
For example, [[The Jacobins#Pure Bastille|1407eff & 1789 version of bastille]], named ''pure bastille'', tempers out the [[jacobin comma]], which brings two great French Revolution terms in one temperament. However, from a just intonation perspective, such temperament may be too complex, even for EDOs in the thousands. On the other hand, taking patent vals of 1407edo and 1789edo in the full 13-limit produces a temperament whose fifth is mapped to [[112/75]], a relatively simple interval on this scale. Comma basis for this version of bastille is {384912/384475, 41765625/41746432, 4501875/4499456, 540078539/540000000}.
 
It should be noted, however, that in no version of Bastille the generator fifth is mapped to [[3/2]].
 
[[Category:Temperaments]]
[[Category:Jacobin]]
[[Category:Rank 2]]

Revision as of 08:41, 19 January 2023

Bastille is a sequence of mos scales supported by 1407edo and 1789edo. It derives its name from the fact that the storming of Bastille happened on 14 July 1789, which in date format is written as 14/07/1789.

The defining characterstic of Bastille is that the generator is a "meantone" flat fifth of around 694.5 cents. Such a characteristic is quite remarkable for edos in the thousands to support.

Theory

The 1407eff & 1789 temperament, named pure bastille, tempers out the jacobin comma, which brings two great French Revolution terms in one temperament. However, from a just intonation perspective, such temperament may be too complex, even for edos in the thousands. On the other hand, taking patent vals of 1407edo and 1789edo in the full 13-limit produces a temperament whose fifth is mapped to 112/75, a relatively simple interval on this scale. Comma basis for this version of bastille is {384912/384475, 41765625/41746432, 4501875/4499456, 540078539/540000000}.