Well temperament
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In Western music theory, a well temperament is a type of tempered tuning used for keyboard instruments of the seventeenth and eighteenth centuries. The term is modeled on the German word wohltemperier
Cover of Orgelprobe (1681)
Equal temperament
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Equal temperament is a musical temperament that divides the octave into 12 identical parts. It is a logarithmic scale with a ratio equal to the 12th root of 2. The scale unit is known as a semitone or
Well temperament
…modulate from one key to another without restriction. This is also the source of the terms "circular temperament" or "circulating temperament". Although equal temperament is discussed by Werckmeister in his treatises, it is distinguished from non-equal well temperaments. The term "well temperament" or "good temperament…
Prince Zhu Zaiyu constructed 12 string equal temperament tuning instrument, front and back view
Zhu Zaiyu's equal temperament pitch pipes
Simon Stevin's Van de Spiegheling der singconst c. 1605