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xenharmonic-devs / scale-workshop

Design and visualize microtonal scales and play them in your web browser. Export your scales for use with VST instruments. Convert Scala files to various tuning formats.
MIT License
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Round after prime mapping not in prime mapping #755

Closed frostburn closed 3 weeks ago

frostburn commented 3 weeks ago

https://sw3.lumipakkanen.com/scale/x5igOPjMt

galaxyspoob — Today at 12:37 PM

In SW3, when CTE tempering is applied where the equave is split, the fraction of the equave (the half-octave in the below example) is sometimes off by 1 minimum unit of interval size, no matter the setting of cents digits after the decimal point.

E.g. when https://sw3.lumipakkanen.com/scale/x5ijC5mUP is tempered by {1716/1715 2080/2079}, 99/70 turns into 599.999, 599.9999, or 600.00001c for the 4-, 5-, and 6-digit settings. (The JI scale was made by writing the first 5 notes, then Repeat, then the manual replacement of 9801/4900 by 2/1.) (Raw version): https://sw3.lumipakkanen.com/scale/x5igaO9ML Ah, so that occurs because PrimeMapping is rounded.