TAudioSignal Class — DSP Master

class TAudioSignal : public TSignal;

Abstract class for audio recording and playback.

Constructors

Name	Description
TAudioSignal (2)

Destructors

Name	Description
~TAudioSignal

Properties

Name	Type	Description
Active	bool
AutoPull	bool	Set the property to True, for the component to call Pull method each time a new buffer is requested.
BandWidth	double	Return the bandwidth of the signal.
BandwidthH	double	Returns the upper bandwidth edge of the signal.
BandwidthL	double	Returns the lower bandwidth edge of the signal.
BlockAssign	bool	Block streaming of specific properties when storing only a "template".
BufferSize	int	Defines the size of the audio stream buffers.
ChannelCount	int	Get or set the number of channels multiplexed in the data property.
Complex	bool	Set this property to true, to request computation using complex numbers.
Continuous	bool	If True, the component will pass on the udpate request to the connected component.
Data	TVec*	Stores the result of the processing.
Dt	double	Time between two consecutive samples.
EditorActive	bool	Returns True, if the component editor is displayed.
FloatPrecision	TMtxFloatPrecision	Set this property to request computation in 32bit/64bit precision with real/complex numbers.
FloatPrecisionLock	bool	Set this property to true to lock changes to FloatPrecision property.
HzRes	double	Frequency resolution obtained, if an FFT algorithm would be run on the data.
Input	TSignal*
Inputs	TSignalCollection*
IsDouble	bool	Set this property to false, to request computation in 32bit floating point precision, 64bit, if true.
ItemNumber	int	Number to label the object when it is an item in the List.
Length	int	Get or set the length of the signal in samples.
Marks	TMarkList*	Stores the time stamps and amplitude of selected samples.
MaxAmplt	double	Stores the maximum amplitude of the signal found by the MinMax method.
MaxX	double	Use the MaxX property to store the time stamp (in seconds) of the right most sample.
MinAmplt	double	Stores the minimum amplitude of the signal found by the MinMax method.
MinX	double	Use the MinX property to store the time stamp of the left-most sample.
MonitorAggressiveness	int	Defines how aggressivelly will the MonitorData function attempt to obtain the very latest data (just to be recorded or just to be played back.) The value is defined in miliseconds.
MonitorFreq	float	The property keeps the track of the actual frequency of the calls to the MonitorData property.
MultiChannel	bool	Set MultiChannel to True, if Inputs property will be published, and Input property will remain hidden.
Name	DewString
NumBuffers	int	Defines number of buffers being gueued to be processed.
OnAfterUpdate	tNotifyEvent	The event is triggered after the call to the Update method.
OnBeforeUpdate	tNotifyEvent	The event is triggered just before the call to the Update method.
OnDisplayUpdate	tNotifyEvent	The event is triggered after the OnAfterUpdate event. Use this event to update any associated charts or graphs or result tables.
OnGetInput	tNotifyEvent	If the Input property is not assigned, the component will call OnGetInput.
OnNotifyUpdate	tNotifyEvent	The event is called after a call to InternalUpdate, OnAfterUpdate and OnDisplayUpdate from within the Update method.
OnParameterUpdate	tNotifyEvent	The event is triggered when ParamUpdate method is called. The ParamUpdate method is usually called by component editors when a value was changed by the user and the editor was "Live".
OnStart	tNotifyEvent	Event triggered when processing starts.
OnStop	tNotifyEvent	Event triggered when processing stops.
Overlapping	float	The property holds the statistics for the MonitorData method.
Paused	bool	Set it to true, if you want to pause the playback.
PipeDirty	bool
PipeState	TPipeState	Returns the state of the pipe after the last update.
Quantization	unsigned short	Define dynamics of the signal. 8,16 or 24 bit.
Reference	TReferenceList*	Stores a list of components that have to be notified, when this component is destroyed.
SamplingFrequency	double	Defines the sampling frequency of the signal.
SamplingTime	double	The length of the signal in seconds.
SuspendNotifyUpdate	bool	Set this property to True, to prevent calling OnNotifyUpdate from the Update Method.
UsesInputs	bool	Set it to True to indicate, that valid signals will be connected to the Input or Inputs properties.
WaveDevice	int	Set WaveDevice to -1, to always use default windows sound device.

Methods

Name	Description
AllowStreaming
Append	Appends Sample to the end of the signal.
Assign
AssignTemplate	Assign values of "template-like" published properties from Source.
Copy	Copies signal Data and sampling frequency information.
Crest	Compute the CREST parameter.
DetectChannelCount
EditorClass	To be overriden in descendanr classses.
ElapsedSamples	Returns total number of samples elapsed since start of the processing.
ElapsedTime
get_CValues
get_Values
GetDeviceList	Returns a list of CoreAudio devices.
GetInput
GetInputs
InputsDirty	If all Inputs[i] are dirty the function returns true.
InternalPull	When called, the method will pass Update requests recursively to all connected objects.
Invalidate	Notifies all connected components that this component has fresh data.
LoadFromStream	Load the component from Src stream.
LoadTemplateFromFile	Load a template from file.
LoadTemplateFromStream	Load a template from stream.
MakeWaveFmtConsistent
MarksToStrings	Convert marks to strings.
MinMax	Find minimum and maximum amplitude and store the result in the MinAmplt and MaxAmplt properties.
MonitorData (2)	Call MonitorData to obtain data just to be played or just recorded for input/output monitoring purpose.
MonitorOutput
ParamUpdate	The method can be assigned to some other component even handler, as a notification that a parameter has changed and that Self should consider a recalculation.
Peak	Find the maximum deviation of the signal from its mean value.
PipeReset	Recursively processes all connected components backward and calls Reset method.
Pull	Request recalculation of the entire chain of all connected components.
PullUntilEnd	Calls Pull until pipeEnd is returned.
RecomendedBufferLength	To ensure skip free recording an playback, audio buffers must have some minimum size.
RecomendedBufferSize	To ensure skip free recording an playback, audio buffers must have some minimum size.
ReferenceRemoved
Reset
SaveTemplateToFile	Save template to file.
SaveTemplateToStream	Save template to stream.
SaveToStream	Save the component to Dst stream.
set_CValues
set_Values
SetChannelCount	Sets the value of TSignal.ChannelCount property.
SetComplex
SetFloatPrecision
SetInputs
SetIsDouble
SetQuantization
SetSamplingFrequency	Set the value of the TSignal.SamplingFrequency property.
Size	Assign the size of the signal from Src.
Start	Start playback/recording.
Stereo	Returns True, if the signal is Stereo.
StopAtOnce	Stop processing at once.
StopGracefully	Process all pending buffers and then stop.
Update	Recalculate request.
UpdateNotify	Call this method only, if SuspendNotifyUpdate is True.
Values
ValuesToStrings	Convert values to strings.

Operators

Name	Description
operator[]

Fields

Name	Type	Description
ATimeSignal	TSignal *
BufIndex	int
ContinueProcessing	bool
ErrorMessage	DewString	The property holds any error message after an error has occured.
FAutoPull	bool
fBitsPerSample	unsigned short
FBufferSize	int
FilledBuffers	int	Number of buffers filled with data to be processed, since the start of the processing.
FMonitorAggressiveness	int
FMonitorFreq	float
FNumBuffers	int
FOnStart	tNotifyEvent
FOnStop	tNotifyEvent
FOverlapping	float
FPaused	bool
FRequestedBufferSize	int
FWaveDevice	int
FWaveFmtEx	TWaveFormatExtensible
FWindowHandle	hWnd
GetAllowed	bool
GetPointer	intPtr
GetSize	int
hWaveBuffer	DewArray<intPtr>
ProcessedBuffers	int	Number of buffers actually processed, since the start of the processing.
PWaveHeaders	DewArray<PWaveHdr>
QueuedBuffers	int	Number of buffers queued, to be processed, since the start of the processing.
Tag	intptr_t
WaveBuffer	DewArray<intPtr>