Analyzes audio stream quality by detecting clicks/pops, gaps/dropouts, clipping/corruption, and whether the signal is genuine audio or just noise. More...

#include <QualityAnalysisStream.h>

Inheritance diagram for QualityAnalysisStream:

Public Member Functions
	QualityAnalysisStream ()=default

	QualityAnalysisStream (Print &print)

	QualityAnalysisStream (Stream &stream)

virtual void	addNotifyAudioChange (AudioInfoSupport &bi)
	Adds target to be notified about audio changes.

virtual AudioInfo	audioInfo () override
	provides the actual input AudioInfo

virtual AudioInfo	audioInfoOut ()

int	available () override

int	availableForWrite () override

bool	begin () override

bool	begin (AudioInfo info)

virtual void	clearNotifyAudioChange ()
	Deletes all change notify subscriptions.

void	clearStats ()
	Reset all statistics and detection state.

void	clearTonalitySource ()

virtual void	end ()

void	flush () override

bool	isNotifyActive ()
	Checks if the automatic AudioInfo update is active.

bool	isSignalPresent () const

virtual	operator bool ()

size_t	readBytes (uint8_t *data, size_t len) override

virtual size_t	readSilence (uint8_t *buffer, size_t length)
	Source to generate silence: just sets the buffer to 0.

virtual bool	removeNotifyAudioChange (AudioInfoSupport &bi)
	Removes a target in order not to be notified about audio changes.

void	setAudioInfo (AudioInfo info) override
	Defines the input AudioInfo.

void	setCallback (QualityCallback cb)
	Register a callback for quality issue notifications.

void	setClickThreshold (float ratio)
	Sample-to-sample jump threshold as ratio of max value (0.0 to 1.0)

void	setClippingMargin (float ratio)
	Clipping is detected when sample >= max_value * (1 - margin)

void	setClippingMinSamples (int samples)
	Minimum consecutive samples at max to count as clipping.

void	setDropoutMinSamples (int samples)
	Minimum consecutive near-silent samples to count as a dropout.

void	setNoiseFloorBlockSize (int samples)
	Number of samples per RMS/noise-floor block (default 256)

void	setNoiseFloorTracking (float attack, float release)

void	setNotifyActive (bool flag)
	Deactivate/Reactivate automatic AudioInfo updates: (default is active)

virtual void	setOutput (AudioOutput &out)
	Defines/Changes the output target and registers for audio change notifications.

void	setOutput (Print &out) override
	Defines/Changes the output target.

void	setReporting (int period_ms, Print &output)

void	setSignalMargin (float db)

void	setSignalPresenceMinBlocks (int blocks)

void	setSilenceThreshold (float ratio)
	Samples below this ratio of max value are considered silent.

virtual void	setStream (AudioStream &io)
	Defines/Changes the input & output and registers for audio change notifications.

void	setStream (Stream &io) override
	Defines/Changes the input & output.

void	setTonalityBufferSize (int samples)

void	setTonalityEnabled (bool enabled)

void	setTonalityMinConfidence (float min_confidence)

void	setTonalitySource (FrequencyDetectorAutoCorrelation &detector, float min_confidence=0.3f, int channel=0)

void	setWriteBufferSize (int size)

const QualityStats &	stats () const
	Access the accumulated quality statistics.

float	tonalityConfidence () const

size_t	write (const uint8_t *data, size_t len) override

virtual size_t	write (uint8_t ch) override

virtual void	writeSilence (size_t len)
	Writes len bytes of silence (=0).

Protected Member Functions
void	analyze (const uint8_t *data, size_t len)

template<typename T >
void	analyzeT (const uint8_t *buffer, size_t size)

void	initTonality ()

virtual int	not_supported (int out, const char *msg="")

void	notifyAudioChange (AudioInfo info)

void	printReport ()

void	processRmsBlock ()

void	refillReadBuffer ()
	Refill small read buffer (e.g. 8 bytes) to avoid single byte reads when calling read()

void	reportIfDue ()

void	resetState ()

Protected Attributes
int	_timeout = 10

FrequencyDetectorAutoCorrelation	auto_tonality

QualityCallback	callback = nullptr

float	click_threshold = 0.5f

float	clipping_margin = 0.01f

int	clipping_min_samples = 3

int	consecutive_clipped = 0

int	consecutive_noise_blocks = 0

int	consecutive_signal_blocks = 0

int	consecutive_silent = 0

int	dropout_min_samples = 10

bool	has_prev_sample = false

bool	in_clipping = false

bool	in_dropout = false

AudioInfo	info

bool	is_notify_active = true

uint32_t	last_report_time = 0

float	max_value = 32767.0f

float	noise_floor_attack = 0.3f

bool	noise_floor_initialized = false

float	noise_floor_release = 0.01f

Vector< AudioInfoSupport * >	notify_vector

bool	owns_tonality = true

Stream *	p_io = nullptr

Print *	p_out = nullptr

Print *	p_report = nullptr

FrequencyDetectorAutoCorrelation *	p_tonality = nullptr

Vector< float >	prev_sample

int	report_period_ms = 0

int	rms_block_count = 0

int	rms_block_size = 256

double	rms_sum_sq = 0

float	signal_margin_db = 6.0f

int	signal_present_min_blocks = 3

float	silence_threshold = 0.01f

QualityStats	stats_data

RingBuffer< uint8_t >	tmp_in {0}

RingBuffer< uint8_t >	tmp_out {0}

int	tonality_channel = 0

bool	tonality_enabled = true

float	tonality_min_confidence = 0.3f

int	write_buffer_size = MAX_SINGLE_CHARS

Detailed Description

Analyzes audio stream quality by detecting clicks/pops, gaps/dropouts, clipping/corruption, and whether the signal is genuine audio or just noise.

Insert this stream into an audio pipeline to monitor signal quality in real time. Data passes through unmodified.

Clicks/Pops: detected when the sample-to-sample delta exceeds a configurable threshold (as a ratio of the maximum sample value).
Gaps/Dropouts: detected when consecutive near-zero samples exceed a configurable minimum length.
Clipping: detected when consecutive samples are at (or near) the maximum representable value.
Signal vs. noise: the RMS level is computed over rolling blocks of samples and used to track a slowly-adapting noise-floor estimate (it follows the level down quickly but only creeps up slowly, so it isn't fooled by short loud transients). A block is considered a valid signal once its RMS level stays above the noise floor by a configurable margin (setSignalMargin()) for a minimum number of blocks (setSignalPresenceMinBlocks()). The resulting SNR estimate, noise floor, RMS level and signal-present flag are all available via stats().

Level alone cannot tell audio content apart from loud broadband noise (wind, static, hiss) - both simply exceed the noise floor. To also require the signal to be periodic/tonal (voice, music, tones) rather than random, this class owns and feeds an internal FrequencyDetectorAutoCorrelation by default (enabled out of the box); its normalized autocorrelation confidence is combined with the level gate before signal_present is raised. Autocorrelation is real CPU cost (roughly O(sample_rate^2) per second of audio) - on constrained boards/high sample rates, tune it down with setTonalityBufferSize(), or turn it off entirely with setTonalityEnabled(false) to fall back to the level-only gate. Call setTonalitySource() instead if you want to share an externally-owned/pre-fed detector (e.g. one you already run elsewhere in the pipeline) rather than the built-in one.

Results are available via stats() or through a callback.

Author: Phil Schatzmann

Copyright: GPLv3

Constructor & Destructor Documentation

◆ QualityAnalysisStream() [1/3]

QualityAnalysisStream ( )

default

◆ QualityAnalysisStream() [2/3]

QualityAnalysisStream ( Print & print )

inline

◆ QualityAnalysisStream() [3/3]

QualityAnalysisStream ( Stream & stream )

inline

Member Function Documentation

◆ addNotifyAudioChange()

virtual void addNotifyAudioChange ( AudioInfoSupport & bi )

inlinevirtualinherited

Adds target to be notified about audio changes.

Reimplemented in CodecNOP, EncodedAudioOutput, EncodedAudioStream, AACDecoderFDK, DecoderBasic, CodecChain, MP3DecoderHelix, MP3DecoderMAD, OggContainerDecoder, RTSPClient< TcpClient, UdpSocket >, Pipeline, and Pipeline::ModifyingStreamAdapter.

◆ analyze()

void analyze	(	const uint8_t *	data,
		size_t	len
	)

inlineprotected

◆ analyzeT()

template<typename T >

void analyzeT	(	const uint8_t *	buffer,
		size_t	size
	)

inlineprotected

◆ audioInfo()

virtual AudioInfo audioInfo ( )

inlineoverridevirtualinherited

provides the actual input AudioInfo

Implements AudioInfoSupport.

Reimplemented in JupyterAudioT< T >, MozziStream, TimerCallbackAudioStream, EncodedAudioStream, PureDataStream, AdapterAudioOutputToAudioStream, GeneratedSoundStream< T >, GeneratedSoundStream< int16_t >, and InputMerge< T >.

◆ audioInfoOut()

virtual AudioInfo audioInfoOut ( )

inlinevirtualinherited

provides the actual output AudioInfo: this is usually the same as audioInfo() unless we use a transforming stream

Reimplemented in MP3EncoderShine, PureDataStream, PWMAudioOutput< PWMDriverT >, ChannelFormatConverterStreamT< T >, ChannelFormatConverterStream, NumberFormatConverterStreamT< TFrom, TTo >, NumberFormatConverterStream, FormatConverterStream, Pipeline, ResampleStream, ResampleStreamT< TInterpolator >, and SupportedRatesStream.

◆ available()

int available ( )

inlineoverridevirtual

Reimplemented from BaseStream.

◆ availableForWrite()

int availableForWrite ( )

inlineoverridevirtual

Reimplemented from BaseStream.

◆ begin() [1/2]

bool begin ( )

inlineoverridevirtual

Reimplemented from BaseStream.

◆ begin() [2/2]

bool begin ( AudioInfo info )

inline

◆ clearNotifyAudioChange()

virtual void clearNotifyAudioChange ( )

inlinevirtualinherited

Deletes all change notify subscriptions.

Reimplemented in RTSPClient< TcpClient, UdpSocket >.

◆ clearStats()

void clearStats ( )

inline

Reset all statistics and detection state.

◆ clearTonalitySource()

void clearTonalitySource ( )

inline

Reverts to the built-in tonality detector (the default), undoing a prior setTonalitySource().

◆ end()

virtual void end ( )

inlinevirtualinherited

Reimplemented in FaustStream< DSP >, AudioMP34DT05, I2SCodecStream, MozziStream, PureDataStream, SPDIFOutput, VS1053Stream, WM8960Stream, AdaptiveResamplingStream, AudioLoRa, ESPNowStream, BufferedTaskStream, URLStreamBufferedT< T >, URLStreamBufferedT< ICYStream >, USBAudioDeviceBase, GoertzelStream, Equalizer3BandsT< T >, I2SStream, AudioStreamWrapper, TimerCallbackAudioStream, FormatConverterStream, FileLoopT< FileType >, FileLoopT< File >, EqualizerNBands< SampleT, AccT, NUM_TAPS, NUM_BANDS >, EncodedAudioStream, AudioKitStream, MiniAudioStream, PortAudioStream, StdioStream, A2DPStream, HLSStreamT< URLStream >, HttpRequest, ICYStreamT< T >, URLStream, URLStreamESP32, NRF24Stream, SPIAudioSlave, AutomaticGainControlStream, VolumeStream, AnalogAudioStream, AudioEffectStreamT< T >, AudioEffectStream, Equalizer3BandsPerChannelT< T >, ReformatBaseStream, AdapterAudioOutputToAudioStream, MemoryStream, GeneratedSoundStream< T >, GeneratedSoundStream< int16_t >, InputMixer< T, SumT >, InputMerge< T >, CallbackStream, FilteredStream< T, TF >, FilteredStream< int16_t, int16_t >, ChannelFormatConverterStream, NumberFormatConverterStream, CatStream, QueueStream< T >, QueueStream< uint8_t >, DynamicMemoryStream, Pipeline, Pipeline::ModifyingStreamAdapter, SupportedRatesStream, AudioFFTBase, AudioBLEClient, AudioBLEClient, AudioBLEServer, AudioBLEServer, AbstractURLStream, and AudioBLEStream.

◆ flush()

void flush ( )

inlineoverridevirtual

Reimplemented from BaseStream.

◆ initTonality()

void initTonality ( )

inlineprotected

(Re-)initializes the built-in tonality detector to match the current AudioInfo, unless an external one was set via setTonalitySource() or the tonality gate was disabled via setTonalityEnabled(false).

◆ isNotifyActive()

bool isNotifyActive ( )

inlineinherited

Checks if the automatic AudioInfo update is active.

◆ isSignalPresent()

bool isSignalPresent ( ) const

inline

True while the signal is currently considered present (see setSignalMargin())

◆ not_supported()

virtual int not_supported	(	int	out,
		const char *	msg = `""`
	)

inlineprotectedvirtualinherited

◆ notifyAudioChange()

void notifyAudioChange ( AudioInfo info )

inlineprotectedinherited

◆ operator bool()

virtual operator bool ( )

inlinevirtualinherited

Reimplemented in A2DPStream, ICYStreamT< T >, AudioBLEStream, PortAudioStream, URLStream, USBAudioDeviceBase, I2SStream, AdapterAudioOutputToAudioStream, TimedStream, MemoryStream, GeneratedSoundStream< T >, GeneratedSoundStream< int16_t >, Pipeline, and AudioFFTBase.

◆ printReport()

void printReport ( )

inlineprotected

◆ processRmsBlock()

void processRmsBlock ( )

inlineprotected

Called once per rms_block_size samples: updates rms_level, noise_floor, snr_db and the signal_present flag/callbacks.

◆ readBytes()

size_t readBytes	(	uint8_t *	data,
		size_t	len
	)

inlineoverridevirtual

Reimplemented from AudioStream.

◆ readSilence()

virtual size_t readSilence	(	uint8_t *	buffer,
		size_t	length
	)

inlinevirtualinherited

Source to generate silence: just sets the buffer to 0.

◆ refillReadBuffer()

void refillReadBuffer ( )

inlineprotectedinherited

Refill small read buffer (e.g. 8 bytes) to avoid single byte reads when calling read()

◆ removeNotifyAudioChange()

virtual bool removeNotifyAudioChange ( AudioInfoSupport & bi )

inlinevirtualinherited

Removes a target in order not to be notified about audio changes.

Reimplemented in RTSPClient< TcpClient, UdpSocket >.

◆ reportIfDue()

void reportIfDue ( )

inlineprotected

◆ resetState()

void resetState ( )

inlineprotected

◆ setAudioInfo()

void setAudioInfo ( AudioInfo info )

inlineoverridevirtual

Defines the input AudioInfo.

Reimplemented from AudioStream.

◆ setCallback()

void setCallback ( QualityCallback cb )

inline

Register a callback for quality issue notifications.

◆ setClickThreshold()

void setClickThreshold ( float ratio )

inline

Sample-to-sample jump threshold as ratio of max value (0.0 to 1.0)

◆ setClippingMargin()

void setClippingMargin ( float ratio )

inline

Clipping is detected when sample >= max_value * (1 - margin)

◆ setClippingMinSamples()

void setClippingMinSamples ( int samples )

inline

Minimum consecutive samples at max to count as clipping.

◆ setDropoutMinSamples()

void setDropoutMinSamples ( int samples )

inline

Minimum consecutive near-silent samples to count as a dropout.

◆ setNoiseFloorBlockSize()

void setNoiseFloorBlockSize ( int samples )

inline

Number of samples per RMS/noise-floor block (default 256)

◆ setNoiseFloorTracking()

void setNoiseFloorTracking	(	float	attack,
		float	release
	)

inline

How quickly the noise floor tracks a falling level (0.0-1.0, default 0.3). Higher = faster. How slowly it tracks a rising level (0.0-1.0, default 0.01). Lower = slower, so brief loud transients don't raise the estimated floor.

◆ setNotifyActive()

void setNotifyActive ( bool flag )

inlineinherited

Deactivate/Reactivate automatic AudioInfo updates: (default is active)

◆ setOutput() [1/2]

virtual void setOutput ( AudioOutput & out )

inlinevirtualinherited

Defines/Changes the output target and registers for audio change notifications.

Reimplemented in TimedStream, VolumeMeter, AudioInputMonitor, ReformatBaseStream, FormatConverterStream, and EncodedAudioStream.

◆ setOutput() [2/2]

void setOutput ( Print & out )

inlineoverridevirtual

Defines/Changes the output target.

Implements ModifyingStream.

◆ setReporting()

void setReporting	(	int	period_ms,
		Print &	output
	)

inline

Enable periodic reporting of quality KPIs

Parameters

period_ms	Reporting interval in milliseconds
output	Print target (e.g. Serial)

◆ setSignalMargin()

void setSignalMargin ( float db )

inline

dB the RMS level must stay above the noise floor to count as signal (default 6dB)

◆ setSignalPresenceMinBlocks()

void setSignalPresenceMinBlocks ( int blocks )

inline

Consecutive blocks required above/below the margin before toggling signal_present (default 3)

◆ setSilenceThreshold()

void setSilenceThreshold ( float ratio )

inline

Samples below this ratio of max value are considered silent.

◆ setStream() [1/2]

virtual void setStream ( AudioStream & io )

inlinevirtualinherited

Defines/Changes the input & output and registers for audio change notifications.

Reimplemented in VolumeMeter, AudioInputMonitor, FormatConverterStream, ReformatBaseStream, TimedStream, and EncodedAudioStream.

◆ setStream() [2/2]

void setStream ( Stream & in )

inlineoverridevirtual

Defines/Changes the input & output.

Implements ModifyingStream.

◆ setTonalityBufferSize()

void setTonalityBufferSize ( int samples )

inline

Analysis buffer size (in samples) used by the built-in tonality detector. Larger = more accurate/expensive, smaller = cheaper/less accurate. Only relevant while using the built-in detector (i.e. before calling setTonalitySource()). Applied on the next begin()/setAudioInfo().

◆ setTonalityEnabled()

void setTonalityEnabled ( bool enabled )

inline

Enable/disable the tonality gate (enabled by default using a built-in FrequencyDetectorAutoCorrelation). When disabled, signal_present depends only on the level/noise-floor gate. Re-enabling restores the built-in detector unless an external one was set via setTonalitySource().

◆ setTonalityMinConfidence()

void setTonalityMinConfidence ( float min_confidence )

inline

Minimum tonality confidence (0.0-1.0, default 0.3) for a block to count as signal rather than noise.

◆ setTonalitySource()

void setTonalitySource	(	FrequencyDetectorAutoCorrelation &	detector,
		float	min_confidence = `0.3f`,
		int	channel = `0`
	)

inline

Overrides the built-in tonality detector with an externally-owned one that you feed yourself (e.g. because you already run it elsewhere in the pipeline). You are responsible for calling begin()/write() on it; this class only reads its confidence().

Parameters

detector	The autocorrelation detector to query.
min_confidence	Minimum tonality confidence (0.0-1.0, default 0.3).
channel	Channel to query on the detector (default 0).

◆ setWriteBufferSize()

void setWriteBufferSize ( int size )

inlineinherited

◆ stats()

const QualityStats & stats ( ) const

inline

Access the accumulated quality statistics.

◆ tonalityConfidence()

float tonalityConfidence ( ) const

inline

Last tonality/periodicity confidence reported by the tonality source (0 if none is set), see setTonalitySource()

◆ write() [1/2]

size_t write	(	const uint8_t *	data,
		size_t	len
	)

inlineoverridevirtual

Reimplemented from AudioStream.

◆ write() [2/2]

virtual size_t write ( uint8_t ch )

inlineoverridevirtualinherited

Reimplemented in MemoryStream, AudioStreamWrapper, BufferedTaskStream, RingBufferStream, BufferedStream, and URLStream.

◆ writeSilence()

virtual void writeSilence ( size_t len )

inlinevirtualinherited

Writes len bytes of silence (=0).

Member Data Documentation

◆ _timeout

int _timeout = 10

protectedinherited

◆ auto_tonality

FrequencyDetectorAutoCorrelation auto_tonality

protected

◆ callback

QualityCallback callback = nullptr

protected

◆ click_threshold

float click_threshold = 0.5f

protected

◆ clipping_margin

float clipping_margin = 0.01f

protected

◆ clipping_min_samples

int clipping_min_samples = 3

protected

◆ consecutive_clipped

int consecutive_clipped = 0

protected

◆ consecutive_noise_blocks

int consecutive_noise_blocks = 0

protected

◆ consecutive_signal_blocks

int consecutive_signal_blocks = 0

protected

◆ consecutive_silent

int consecutive_silent = 0

protected

◆ dropout_min_samples

int dropout_min_samples = 10

protected

◆ has_prev_sample

bool has_prev_sample = false

protected

◆ in_clipping

bool in_clipping = false

protected

◆ in_dropout

bool in_dropout = false

protected

◆ info

AudioInfo info

protectedinherited

◆ is_notify_active

bool is_notify_active = true

protectedinherited

◆ last_report_time

uint32_t last_report_time = 0

protected

◆ max_value

float max_value = 32767.0f

protected

◆ noise_floor_attack

float noise_floor_attack = 0.3f

protected

◆ noise_floor_initialized

bool noise_floor_initialized = false

protected

◆ noise_floor_release

float noise_floor_release = 0.01f

protected

◆ notify_vector

Vector<AudioInfoSupport*> notify_vector

protectedinherited

◆ owns_tonality

bool owns_tonality = true

protected

◆ p_io

Stream* p_io = nullptr

protected

◆ p_out

Print* p_out = nullptr

protected

◆ p_report

Print* p_report = nullptr

protected

◆ p_tonality

FrequencyDetectorAutoCorrelation* p_tonality = nullptr

protected

◆ prev_sample

Vector<float> prev_sample

protected

◆ report_period_ms

int report_period_ms = 0

protected

◆ rms_block_count

int rms_block_count = 0

protected

◆ rms_block_size

int rms_block_size = 256

protected

◆ rms_sum_sq

double rms_sum_sq = 0

protected

◆ signal_margin_db

float signal_margin_db = 6.0f

protected

◆ signal_present_min_blocks

int signal_present_min_blocks = 3

protected

◆ silence_threshold

float silence_threshold = 0.01f

protected

◆ stats_data

QualityStats stats_data

protected

◆ tmp_in

RingBuffer<uint8_t> tmp_in {0}

protectedinherited

◆ tmp_out

RingBuffer<uint8_t> tmp_out {0}

protectedinherited

◆ tonality_channel

int tonality_channel = 0

protected

◆ tonality_enabled

bool tonality_enabled = true

protected

◆ tonality_min_confidence

float tonality_min_confidence = 0.3f

protected

◆ write_buffer_size

int write_buffer_size = MAX_SINGLE_CHARS

protectedinherited

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

src/AudioTools/CoreAudio/Analysis/QualityAnalysisStream.h

Public Member Functions

Protected Member Functions

Protected Attributes

Detailed Description

Constructor & Destructor Documentation

◆ QualityAnalysisStream() [1/3]

◆ QualityAnalysisStream() [2/3]

◆ QualityAnalysisStream() [3/3]

Member Function Documentation

◆ addNotifyAudioChange()

◆ analyze()

◆ analyzeT()

◆ audioInfo()

◆ audioInfoOut()

◆ available()

◆ availableForWrite()

◆ begin() [1/2]

◆ begin() [2/2]

◆ clearNotifyAudioChange()

◆ clearStats()

◆ clearTonalitySource()

◆ end()

◆ flush()

◆ initTonality()

◆ isNotifyActive()

◆ isSignalPresent()

◆ not_supported()

◆ notifyAudioChange()

◆ operator bool()

◆ printReport()

◆ processRmsBlock()

◆ readBytes()

◆ readSilence()

◆ refillReadBuffer()

◆ removeNotifyAudioChange()

◆ reportIfDue()

◆ resetState()

◆ setAudioInfo()

◆ setCallback()

◆ setClickThreshold()

◆ setClippingMargin()

◆ setClippingMinSamples()

◆ setDropoutMinSamples()

◆ setNoiseFloorBlockSize()

◆ setNoiseFloorTracking()

◆ setNotifyActive()

◆ setOutput() [1/2]

◆ setOutput() [2/2]

◆ setReporting()

◆ setSignalMargin()

◆ setSignalPresenceMinBlocks()

◆ setSilenceThreshold()

◆ setStream() [1/2]

◆ setStream() [2/2]

◆ setTonalityBufferSize()

◆ setTonalityEnabled()

◆ setTonalityMinConfidence()

◆ setTonalitySource()

◆ setWriteBufferSize()

◆ stats()

◆ tonalityConfidence()

◆ write() [1/2]

◆ write() [2/2]

◆ writeSilence()

Member Data Documentation

◆ _timeout

◆ auto_tonality

◆ callback

◆ click_threshold

◆ clipping_margin

◆ clipping_min_samples

◆ consecutive_clipped

◆ consecutive_noise_blocks

◆ consecutive_signal_blocks

◆ consecutive_silent

◆ dropout_min_samples

◆ has_prev_sample

◆ in_clipping

◆ in_dropout

◆ info