##
##       This based on some ideas from Norman Grant.
##
##       Take a rough average Shuman frequency (earth resonance: 7.83
##       +/- 0.50), multiply up to get it to around 40Hz (rumoured
##       super-harmonic of the brain), giving 39.15Hz, and generate
##       frequencies from this by dividing by primes.
##
#	  39.15 / 1 == 39.15
#	  39.15 / 2 == 19.575
#	  39.15 / 3 == 13.05
#	  39.15 / 5 == 7.83
#	  39.15 / 7 == 5.59285714285714
#	  39.15 / 11 == 3.55909090909091
#	  39.15 / 13 == 3.01153846153846
#	  39.15 / 17 == 2.30294117647059
#	  39.15 / 19 == 2.06052631578947
#	  39.15 / 23 == 1.70217391304348
#	  39.15 / 29 == 1.35
#	  39.15 / 31 == 1.26290322580645
#	  39.15 / 37 == 1.05810810810811
#	  39.15 / 41 == 0.954878048780488
#	  39.15 / 43 == 0.91046511627907
#	  39.15 / 47 == 0.832978723404255
#	  39.15 / 53 == 0.738679245283019
#	  39.15 / 59 == 0.663559322033898
#	  39.15 / 61 == 0.641803278688525
#	  39.15 / 67 == 0.584328358208955
#	  39.15 / 71 == 0.551408450704225
#	  39.15 / 73 == 0.536301369863014
#	  39.15 / 79 == 0.495569620253165
#

-SE

ts1: - 100+39.15/80
ts2: 100+19.575/80
ts3: - 100+13.05/80
ts5: 100+7.83/80
ts7: - 100+5.59285714285714/80
ts11: 100+3.55909090909091/80
ts13: - 100+3.01153846153846/80
ts17: 100+2.30294117647059/80
ts19: - 100+2.06052631578947/80
ts23: 100+1.70217391304348/80
ts29: - 100+1.35/80
ts31: 100+1.26290322580645/80
ts37: - 100+1.05810810810811/80
ts41: 100+0.954878048780488/80
ts43: - 100+0.91046511627907/80
ts47: 100+0.832978723404255/80
ts53: - 100+0.738679245283019/80
ts59: 100+0.663559322033898/80
ts61: - 100+0.641803278688525/80
ts67: 100+0.584328358208955/80
ts71: - 100+0.551408450704225/80
ts73: 100+0.536301369863014/80
ts79: - 100+0.495569620253165/80
off: -

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0:46:10 off