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@ -59,8 +59,9 @@ boolean AudioEffectModulatedDelay::begin(short *delayline, int d_length) |
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_delay_length = d_length; |
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// modulator filter
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// coefficients calculated with "IOWA Hills IIR Filter Designer 6.5"
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// coefficients calculated with "IOWA Hills IIR Filter Designer 6.5", http://www.iowahills.com/8DownloadPage.html
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// OmegaC = 0.5, SR = 44117.64706, Fc = 11 kHz, N=2
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// Example: https://web.fhnw.ch/technik/projekte/eit/Fruehling2016/MuelZum/html/parametric_equalizer_example_8c-example.html
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modulator_filter_coeffs[0] = 0.291938819295525787; // b0
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modulator_filter_coeffs[1] = 0.582700575839973478; // b1
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modulator_filter_coeffs[2] = 0.291938819295525787; // b2
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