195       alpha = sin(w0)/2 * sqrt((A + 1/A)*(1/p->width - 1) + 2);  in start()
199       alpha = sin(w0)/(2*p->width);  in start()
203       alpha = sin(w0)*sinh(log(2.)/2 * p->width * w0/sin(w0));  in start()
207       alpha = sin(w0)/(2*p->fc/p->width);  in start()
236       p->b0 =   sin(w0)/2;  in start()
238       p->b2 =  -sin(w0)/2;  in start()
335       p->b0 = 1 - sin(w0);  in start()
337       p->b2 = 1 + sin(w0);  in start()
338       p->a0 = 1 + sin(w0);  in start()
340       p->a2 = 1 - sin(w0);  in start()
382         double b_im = p->b1 * sin(-y) + p->b2 * sin(-2 * y);  in start()
383         double a_im = p->a1 * sin(-y) + p->a2 * sin(-2 * y);  in start()