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subroutine transn(ityp,om,norma,vsn,vd,a)
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c computation of the parameters of the normalized lowpass
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implicit double precision (a-h,o-z)
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tan2(aa) = sin(aa/2.0d+0)/cos(aa/2.0d+0)
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c Nomenclature Rabiner-Gold (page 241)
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if (ityp.le.2) go to 210
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if (ityp.eq.3) go to 10
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go to (30, 30, 40, 70), j
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if (q.lt.vsn1) vsn1 = q
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if (norma.eq.2) go to 200
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if (vsn.ge.vsn1) go to 200
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70 vdq = sqrt(v1*v2*v3*v4)
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if (vsn.ge.vsn1) go to 200
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c BUG: NO PATH TO HERE !!!!!
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cccp vsn = v4 - vdq/v4
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cccp a = 1.0d+0/(v3-v2)
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if (ityp.le.3) go to 270
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go to (220, 220, 230, 240, 250, 260), j