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try to add a lpf

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KubaPro010
2025-03-27 18:00:05 +01:00
parent 66ca7317d5
commit 7ff33aa5a7
4 changed files with 56 additions and 4 deletions
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12
lib/filters.h
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@@ -15,4 +15,14 @@ typedef struct
void init_preemphasis(ResistorCapacitor *filter, float tau, float sample_rate);
float apply_preemphasis(ResistorCapacitor *filter, float sample);
float hard_clip(float sample, float threshold);
float hard_clip(float sample, float threshold);
typedef struct
{
float b0, b1, b2;
float a1, a2;
float x1, x2;
float y1, y2;
} Biquad;
void init_butterworth_lpf(Biquad *filter, float cutoff_freq, float sample_rate);
float biquad(Biquad *filter, float input);