lowpass_filter_t Struct Reference

Low-pass filter state. More...

#include <lib/audio/mixer.h>

Data Fields
float	cutoff_hz
	Cutoff frequency in Hz (frequencies above this are attenuated)
float	sample_rate
	Sample rate in Hz (set during initialization)
float	alpha
	Filter coefficient alpha (calculated from cutoff_hz)
float	prev_output
	Previous output sample (filter state)

Detailed Description

Low-pass filter state.

First-order IIR low-pass filter for removing high-frequency noise (hiss, electronic interference) while preserving voice clarity. Combined with high-pass filter creates voice-focused band-pass effect.

Definition at line 241 of file mixer.h.

---

The documentation for this struct was generated from the following file:

• mixer.h