I would respectfully like to add that for me the distinction of appropriate use for equal/non-equal temperament has more to do with whether the music is tonal or atonal than whether or not it was written in the 20th Century. There is a lot of tonal 20th Century music. A couple of years ago I tuned for and attended an all Roger Sessions Piano recital. I could not imagine a music more perfectly suited to ET, and would never presume to be able to significantly improve its musical effect simply by changing the temperament. Dennis Johnson St. Olaf College
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