59 		double alpha = 0.25 * (0.5 + beta - gamma);  in biquad_lowpass()  local
61 		double b0 = 2 * alpha;  in biquad_lowpass()
62 		double b1 = 2 * 2 * alpha;  in biquad_lowpass()
63 		double b2 = 2 * alpha;  in biquad_lowpass()
94 		double alpha = 0.25 * (0.5 + beta + gamma);  in biquad_highpass()  local
96 		double b0 = 2 * alpha;  in biquad_highpass()
97 		double b1 = 2 * -2 * alpha;  in biquad_highpass()
98 		double b2 = 2 * alpha;  in biquad_highpass()
124 			double alpha = sin(w0) / (2 * Q);  in biquad_bandpass()  local
127 			double b0 = alpha;  in biquad_bandpass()
129 			double b2 = -alpha;  in biquad_bandpass()
130 			double a0 = 1 + alpha;  in biquad_bandpass()
132 			double a2 = 1 - alpha;  in biquad_bandpass()
166 		double alpha = 0.5 * sin(w0) *  in biquad_lowshelf()  local
169 		double k2 = 2 * sqrt(A) * alpha;  in biquad_lowshelf()
201 		double alpha = 0.5 * sin(w0) *  in biquad_highshelf()  local
204 		double k2 = 2 * sqrt(A) * alpha;  in biquad_highshelf()
236 			double alpha = sin(w0) / (2 * Q);  in biquad_peaking()  local
239 			double b0 = 1 + alpha * A;  in biquad_peaking()
241 			double b2 = 1 - alpha * A;  in biquad_peaking()
242 			double a0 = 1 + alpha / A;  in biquad_peaking()
244 			double a2 = 1 - alpha / A;  in biquad_peaking()
271 			double alpha = sin(w0) / (2 * Q);  in biquad_notch()  local
277 			double a0 = 1 + alpha;  in biquad_notch()
279 			double a2 = 1 - alpha;  in biquad_notch()
306 			double alpha = sin(w0) / (2 * Q);  in biquad_allpass()  local
309 			double b0 = 1 - alpha;  in biquad_allpass()
311 			double b2 = 1 + alpha;  in biquad_allpass()
312 			double a0 = 1 + alpha;  in biquad_allpass()
314 			double a2 = 1 - alpha;  in biquad_allpass()