Bicycle

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! bicycle.scl
!
13-limit harmonic bicycle, George Secor, 1963
! Transposition of Wilson's Helix Song, see David Rosenthal, Helix Song, XH 7&8, 1979
! Also Andrew Heathwaite's Rodan scale
12
!
13/12
9/8
7/6
5/4
4/3
11/8
3/2
13/8
5/3
7/4
11/6
2/1

Theory

"The design principle: we want as many 7-note 2 3 5 7 9 11 13 complete otonalities as we can get. If we take one of those, offset it by 3/2 as a duplicate otonality, and then take the union of both otonalities, it's this 12 note constant structure scale." (Scott Dakota)

Scott Dakota also refers to this scale as Almond.

Pitch classes and harmonics (C scale)
F C A Eb G B Db
2 3 5 7 9 11 13
C G E Bb D F# Ab
3 9 15 21 27 33 39