Constrained tuning: Difference between revisions

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== CTE tuning vs POTE tuning CWE tuning vs CTWE tuning ==

People have long noted, since the early days of the tuning list, that the CTE tuning, despite having very nice qualities on paper, can give surprisingly strange results. One good example is Blackwood, where the 4:5:6 chord is tuned to 0-386-720 cents, so that the error is ~~no longer~~ evenly divided between the 5/4, 6/5, and 3/2 ~~in a way that~~ was important historically ~~- and which~~ tunings like TE, ~~TOP~~, ~~etc~~ seem to ~~do for you automatically~~. ~~The reasons for this are subtle, but as~~ a result of this, as a result, historically, the POTE tuning was used instead, which tunes it to the much less lopsided (and approximately ~~isoharmonic~~) 0-400-720 cents. People have also suggested using the Kees-Euclidean or KE tuning, also known as the constrained-Weil-Euclidean or CWE tuning. Here is a summary of the historical reasoning behind this.

People have long noted, since the early days of the tuning list, that the CTE tuning, despite having very nice qualities on paper, can give surprisingly strange results. One good example is Blackwood, where the 4:5:6 chord is tuned to 0-386-720 cents, so that the error is not even close to evenly divided between the 5/4, 6/5, and 3/2. The reasons for this are subtle.

This sort of thing was important historically when looking at optimal tunings for meantone. As the entire point of advanced tuning methods like TOP, TE, was to extend this principle in an elegant way to all intervals (and hopefully, triads and large chords), it would seem to defeat the purpose if we use a tuning optimization that doesn't also have this property.

As a result of this, as a result, historically, the POTE tuning was used instead, which tunes it to the much less lopsided (and approximately delta-rational) 0-400-720 cents. People have also suggested using the Kees-Euclidean or KE tuning, also known as the constrained-Weil-Euclidean or CWE tuning. Here is a summary of the math involved and the historical reasoning behind this.

=== The Problem ===

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 == CTE tuning vs POTE tuning CWE tuning vs CTWE tuning ==
-People have long noted, since the early days of the tuning list, that the CTE tuning, despite having very nice qualities on paper, can give surprisingly strange results. One good example is Blackwood, where the 4:5:6 chord is tuned to 0-386-720 cents, so that the error is no longer evenly divided between the 5/4, 6/5, and 3/2 in a way that was important historically - and which tunings like TE, TOP, etc seem to do for you automatically. The reasons for this are subtle, but as a result of this, as a result, historically, the POTE tuning was used instead, which tunes it to the much less lopsided (and approximately isoharmonic) 0-400-720 cents. People have also suggested using the Kees-Euclidean or KE tuning, also known as the constrained-Weil-Euclidean or CWE tuning. Here is a summary of the historical reasoning behind this.
+People have long noted, since the early days of the tuning list, that the CTE tuning, despite having very nice qualities on paper, can give surprisingly strange results. One good example is Blackwood, where the 4:5:6 chord is tuned to 0-386-720 cents, so that the error is not even close to evenly divided between the 5/4, 6/5, and 3/2. The reasons for this are subtle.
+This sort of thing was important historically when looking at optimal tunings for meantone. As the entire point of advanced tuning methods like TOP, TE, was to extend this principle in an elegant way to all intervals (and hopefully, triads and large chords), it would seem to defeat the purpose if we use a tuning optimization that doesn't also have this property.
+As a result of this, as a result, historically, the POTE tuning was used instead, which tunes it to the much less lopsided (and approximately delta-rational) 0-400-720 cents. People have also suggested using the Kees-Euclidean or KE tuning, also known as the constrained-Weil-Euclidean or CWE tuning. Here is a summary of the math involved and the historical reasoning behind this.
 === The Problem ===