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A follow-up of #419, for the banpass filter.
Blink uses
alpha = sin(w0) / (2 * Q); k = cos(w0);
b0 = alpha; b1 = 0; b2 = -alpha; a0 = 1 + alpha; a1 = -2 * k; a2 = 1 - alpha;
This has exactly the same form as the cookbook, if alpha = a_BW. But alpha here is the same as the cookbook's a_Q, not a_BW.
The text was updated successfully, but these errors were encountered:
Use correct formulas for the bandpass, notch, peaking, lowshelf, and
8110a1d
highshelf filters. Fix WebAudio#428, fix WebAudio#429, fix WebAudio#430, fix WebAudio#431, fix WebAudio#432.
rtoy
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A follow-up of #419, for the banpass filter.
Blink uses
alpha = sin(w0) / (2 * Q);
k = cos(w0);
b0 = alpha;
b1 = 0;
b2 = -alpha;
a0 = 1 + alpha;
a1 = -2 * k;
a2 = 1 - alpha;
This has exactly the same form as the cookbook, if alpha = a_BW. But alpha here is the same as the cookbook's a_Q, not a_BW.
The text was updated successfully, but these errors were encountered: