I've gotta wonder what planet I'm on this week when something like this comes up. In a decent aural tuning, where the 3rds, 4ths, 5ths, 6ths, octaves, 10ths, 12ths, double octaves, 17ths, and even triple octaves all fall into some reasonably sane relationship, the 4ths and 5ths beat at pretty much the same speed, respectively, throughout the scale. The determination of this is a result of listening rather than math and theory. Remember listening? Hands? This would be in the coin of the realm, or what nominally passes for ET. Do any of you actually produce tunings that have 4ths and 5ths audibly increasing in beat rate as you go up scale? If so, how? Eternally mystified, Ron N
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