For those interested in unequal temperaments: here are the slides I used in a lecture on Wednesday evening. It is an attempt to explain some of the most important tuning principles (and the operation of tonality, and diatonic scales) with as little math as possible, and without expecting the audience to be able to read music. An interesting challenge. http://larips.50webs.com/ There is a long section in there about the reasons why circulating temps aren't very well understood. Brad Lehman
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