mic_response_data.h File Reference

Detailed Description

High-resolution microphone frequency response data and utilities.

Stores 61-point (1/6-octave, 20 Hz–20 kHz) mic response curves as the source of truth. At init time these are downsampled to whatever bin layout the equalizer uses. Pink noise compensation is computed from bin centers rather than hardcoded.

Definition in file mic_response_data.h.

#include "fl/audio/mic_profiles.h"
#include "fl/stl/compiler_control.h"
#include "fl/math/math.h"
#include "fastled_progmem.h"

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Classes
struct	fl::audio::MicResponseCurve

Namespaces
namespace	fl
	Base definition for an LED controller.
namespace	fl::audio

Functions
float	fl::audio::computePinkNoiseGain (float freq_hz, float f_ref)
	Compute pink noise compensation gain for a single frequency.
void	fl::audio::computePinkNoiseGains (const float *binCenters, int numBins, float *out)
	Compute pink noise compensation gains for all bins.
void	fl::audio::downsampleMicResponse (const MicResponseCurve &curve, const float *binCenters, int numBins, float *out)
	Downsample a high-resolution mic response curve to N output bins.
float	fl::audio::fl_progmem_read_float (const float *addr)
	Read a float from PROGMEM.
MicResponseCurve	fl::audio::getMicResponseCurve (MicProfile profile)
	Get the high-resolution response curve for a given mic profile.
float	fl::audio::interpolateMicResponse (const MicResponseCurve &curve, float freq_hz)
	Interpolate mic response at an arbitrary frequency (Hz).

Variables
static const float	fl::audio::kMicResponse_GenericMEMS [kMicResponsePoints]
static const float	fl::audio::kMicResponse_ICS43434 [kMicResponsePoints]
static const float	fl::audio::kMicResponse_INMP441 [kMicResponsePoints]
static const float	fl::audio::kMicResponse_LineIn [kMicResponsePoints]
static const float	fl::audio::kMicResponse_SPM1423 [kMicResponsePoints]
static const float	fl::audio::kMicResponseFreqs [kMicResponsePoints]
static constexpr int	fl::audio::kMicResponsePoints = 61

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Class Documentation

fl::audio::MicResponseCurve

struct fl::audio::MicResponseCurve

Class Members
int	count	Number of data points.
const float *	freqs	Pointer to frequency array (PROGMEM)
const float *	gains	Pointer to gain array (PROGMEM)