Musical tuning
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In music, there are two common meanings for tuning:
Man turning tuning pegs to tune guitar
Tuning of Sébastien Érard harp using Korg OT-120 Wide 8 Octave Orchestral Digital Tuner
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
Musical tuning
…each string can be tuned to its own reference tone. Note that while the guitar and other modern stringed instruments with fixed frets are tuned in equal temperament, string instruments without frets, such as those of the violin family, are not. The violin, viola, and cello are tuned to beatless, just perfect fifths…
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