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17 equal temperament
Musical tuning system with 17 pitches equally-spaced on a logarithmic scale / From Wikipedia, the free encyclopedia
In music, 17 equal temperament is the tempered scale derived by dividing the octave into 17 equal steps (equal frequency ratios). Each step represents a frequency ratio of 17√2, or 70.6 cents.
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17-ET is the tuning of the regular diatonic tuning in which the tempered perfect fifth is equal to 705.88 cents, as shown in Figure 1 (look for the label "17-TET").