pulp::test::audio::ResponseCurve Struct Reference

Magnitude/frequency-response curve. More...

#include <audio_spectrum.hpp>

Public Member Functions
double	magnitude_db_at (double hz) const
	Magnitude (dB) at the bin nearest hz on the full curve.
double	attenuation_db_at (double hz) const
	Positive attenuation in dB at hz (0 dB = unity, larger = more cut).

Public Attributes
std::string	analyzer = "magnitude_response"
std::string	stimulus
	e.g. "impulse" / "log_sweep 20..20000".
Window	window = Window::rectangular
int	fft_length = 0
int	analysis_offset = 0
double	sample_rate = 0.0
double	bin_hz = 0.0
	Frequency resolution (sample_rate / fft_length).
std::vector< ResponsePoint >	full
	Bin 0..N/2, monotonic in hz.
std::vector< ResponsePoint >	checkpoints
	Requested frequencies only.

Detailed Description

Magnitude/frequency-response curve.

Determinism contract (echoed into the artifact):

• stimulus: a unit impulse (or caller-supplied stimulus) driven through the processor;
• window/length: stated window over an fft_length-sample segment beginning at analysis_offset (skip plugin latency / warm-up here);
• reference: each point is output-magnitude over input-magnitude in dB (a true transfer response), so absolute FFT scale cancels;
• resolution: one full-resolution bin every sample_rate / fft_length Hz; checkpoint values are read from the nearest bin (no interpolation), and bin_hz records that resolution for the tolerance to budget.

Member Function Documentation

attenuation_db_at()

double pulp::test::audio::ResponseCurve::attenuation_db_at ( double hz ) const

inline

Positive attenuation in dB at hz (0 dB = unity, larger = more cut).

Convenience over magnitude_db_at for the "drops N dB" claim.

magnitude_db_at()

double pulp::test::audio::ResponseCurve::magnitude_db_at

(

double

hz

)

const

Magnitude (dB) at the bin nearest hz on the full curve.

Returns kSilenceFloorDb if the curve is empty.

Member Data Documentation

analysis_offset

int pulp::test::audio::ResponseCurve::analysis_offset = 0

analyzer

std::string pulp::test::audio::ResponseCurve::analyzer = "magnitude_response"

bin_hz

double pulp::test::audio::ResponseCurve::bin_hz = 0.0

Frequency resolution (sample_rate / fft_length).

checkpoints

std::vector<ResponsePoint> pulp::test::audio::ResponseCurve::checkpoints

Requested frequencies only.

fft_length

int pulp::test::audio::ResponseCurve::fft_length = 0

full

std::vector<ResponsePoint> pulp::test::audio::ResponseCurve::full

Bin 0..N/2, monotonic in hz.

sample_rate

double pulp::test::audio::ResponseCurve::sample_rate = 0.0

stimulus

std::string pulp::test::audio::ResponseCurve::stimulus

e.g. "impulse" / "log_sweep 20..20000".

window

Window pulp::test::audio::ResponseCurve::window = Window::rectangular

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

• /home/runner/work/pulp/pulp/tools/audio/analysis/include/pulp/audio/analysis/audio_spectrum.hpp