pulp::test::audio::ModulationSidebandReport Struct Reference

Where a steady tone's energy went after a periodic modulation was applied to it. More...

#include <audio_spectrum.hpp>

Public Attributes
double	carrier_hz = 0.0
double	modulation_hz = 0.0
double	carrier_power = 0.0
	Power at the carrier's own line (the carrier itself); the reference the two ratios are relative to.
double	sideband_db = kSilenceFloorDb
	Power at the carrier +/- k * modulation_hz, re the carrier, dB.
double	residual_db = kSilenceFloorDb
	Power everywhere else in the band, re the carrier, dB.
int	fft_length = 0
double	bin_hz = 0.0

Detailed Description

Where a steady tone's energy went after a periodic modulation was applied to it.

A carrier whose level (or any parameter) is moved by a periodic law at modulation_hz carries all of its energy at the carrier and at the carrier +/- k times that frequency: the sidebands are the modulation, and anything else in the band is what the modulation PATH added – a stepper's hold images, the fold of a modulation the path sampled too slowly to represent, noise. The two ratios are the A/B of a modulation path: a faithful path reads a high sideband_db and a residual_db at the floor a run without modulation establishes.

Member Data Documentation

bin_hz

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

carrier_hz

double pulp::test::audio::ModulationSidebandReport::carrier_hz = 0.0

carrier_power

double pulp::test::audio::ModulationSidebandReport::carrier_power = 0.0

Power at the carrier's own line (the carrier itself); the reference the two ratios are relative to.

Backend-scaled: use only as a ratio.

fft_length

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

modulation_hz

double pulp::test::audio::ModulationSidebandReport::modulation_hz = 0.0

residual_db

double pulp::test::audio::ModulationSidebandReport::residual_db = kSilenceFloorDb

Power everywhere else in the band, re the carrier, dB.

sideband_db

double pulp::test::audio::ModulationSidebandReport::sideband_db = kSilenceFloorDb

Power at the carrier +/- k * modulation_hz, re the carrier, dB.

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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