just messed around on a keyboard a bit and i can't unhear it now. major thirds in equal temperament sound off š¤¢ can't believe i've been playing "nervous, agitated" thirds on a piano my entire life
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the upshot is that equal temperament makes fifths sound very good (2 cents off from just) which might explain why i like 9th chords so much (three fifths)
gonna fuck around with just omitting thirds from chords for awhile now
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You might like to try 31 tone equal temperament, which has somewhat more active fifths (~5 cents flat), but rather pure thirds (less than a cent sharp). It's still meantone temperament, so going up two fifths and down two fourths lands you on a third.
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Or 53 equal is also pretty nice, it has a third which is less than two cents flat, and a fifth that is less than a tenth of a cent flat -- but the downside is that the best third is not four steps up along the circle of fifths, but rather 8 steps down.
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Keep going down this rabbit hole and you end up playing keyboards that look like this:
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