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In contrast to modern scales, the tetrachord was perceived as descending from its highest pitch (here ''mese''). Thus the pitches are given in terms of their ratios downward from mese, or as negative Cents .

Here are the traditional Pythagorean Tuning s of the diatonic and chromatic tetrachords:

Diatonic
hypate parhypate lichanos mese
4/3 81/64 9/8 1/1
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