Lines Matching refs:alpha
100 alpha = sin(w0) / (2.0 * QS);
102 alpha = sin(w0) * 0.5 * sqrt(A + ((1.0 / A) * \
105 alpha = 0.0;
107 return (alpha);
127 w0, A, alpha, a0, a1, a2, b0, b1, b2)
131 alpha = feedeq_alpha(w0, A, FEEDEQ_TREBLE_SLOPE);
134 b0 = 1.0 + (alpha * A);
136 b2 = 1.0 - (alpha * A);
137 a0 = 1.0 + (alpha / A);
139 a2 = 1.0 - (alpha / A);
141 b0 = A*((A+1.0)+((A-1.0)*cos(w0))+(2.0*sqrt(A)*alpha));
143 b2 = A*((A+1.0)+((A-1.0)*cos(w0))-(2.0*sqrt(A)*alpha));
144 a0 = (A+1.0)-((A-1.0)*cos(w0))+(2.0*sqrt(A)*alpha );
146 a2 = (A+1.0)-((A-1.0)*cos(w0))-(2.0*sqrt(A)*alpha );
165 alpha = feedeq_alpha(w0, A, FEEDEQ_BASS_SLOPE);
168 b0 = 1.0 + (alpha * A);
170 b2 = 1.0 - (alpha * A);
171 a0 = 1.0 + (alpha / A);
173 a2 = 1.0 - (alpha / A);
175 b0 = A*((A+1.0)-((A-1.0)*cos(w0))+(2.0*sqrt(A)*alpha));
177 b2 = A*((A+1.0)-((A-1.0)*cos(w0))-(2.0*sqrt(A)*alpha));
178 a0 = (A+1.0)+((A-1.0)*cos(w0))+(2.0*sqrt(A)*alpha );
180 a2 = (A+1.0)+((A-1.0)*cos(w0))-(2.0*sqrt(A)*alpha );