! 17-53.scl ! 17 out of 53-tET, Arabic Pythagorean scale, Safiyuddîn Al-Urmawî (Safi al-Din) 17 ! 90.56604 181.13208 203.77358 294.33962 384.90566 407.54717 498.11321 588.67925 679.24528 701.88679 792.45283 883.01887 905.66038 996.22642 1086.79245 1177.35849 2/1