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! wilson_helix.scl ! Wilson's Helix Song, see David Rosenthal, Helix Song, XH 7&8, 1979. Also Secor, 1964 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