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24 lines
563 B
C++
24 lines
563 B
C++
1 year ago
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/**
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* 6_iir_test.cpp
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* Written by Clyne Sullivan.
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*
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* Implements a simple infinite impulse response (IIR) filter using an alpha
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* parameter.
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* To build upon this example, try setting `alpha` with a parameter knob:
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* alpha = param1() / 4095.0
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*/
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Sample* process_data(Samples samples)
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{
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constexpr float alpha = 0.7;
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static Sample prev = 2048;
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samples[0] = (1 - alpha) * samples[0] + alpha * prev;
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for (unsigned int i = 1; i < SIZE; i++)
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samples[i] = (1 - alpha) * samples[i] + alpha * samples[i - 1];
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prev = samples[SIZE - 1];
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return samples;
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}
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