! dudon_natte.scl ! Sequence of 7 consecutive tones of a Natte series from 28 to 151 12 ! 86/57 65/57 98/57 74/57 151/114 2/1 86/57 65/57 98/57 74/57 112/57 2/1 ! White keys play the seven tones (with two commas 148:151 and 56:57), ! Black keys play only plain pentatonic 43 : 49 : 57 : 65 : 74 ! Natte fractal sequence (Dudon), known also as "Meta-Slendro" (Wilson) ! x^3 = x + 1, or x^5 = x^4 + 1, x = 1.3247179572447