Alignment Delay

Overview

Module that aligns the accumulated output delay at all output pins

Discussion

This subsystem module aligns all of the input pins so that all of the outputs have the same accumulated delay. It relies on the value of the accumulated delay wire property for each of the input pins to determine the delay that needs to be applied for each input channel of each input pin. Audio signals of input pins must be a real number in time domain.

If outputDelayMs argument is blank, the module aligns the output delay to the maximum accumulated delay over all input pins. If outputDelayMs argument has a value, the module aligns the output delay to the specified delay value. The module will show an error message if outputDelayMs value is smaller than the maximum accumulated delay over all input pins.

Module Pack

Advanced

ClassID

classID =

Type Definition

typedef struct _ModuleAlignmentDelay
{
ModuleInstanceDescriptor instance;            // Common Audio Weaver module instance structure
} ModuleAlignmentDelayClass;

Variables

Properties

Name	Type	Usage	isHidden	Default Value	Range	Units
outputDelay	float	derived	1	0	Unrestricted

Pins

Input Pins


Name	in1
Description	Audio Input
Data type	{float, int, fract32}
Channel range	Unrestricted
Block size range	Unrestricted
Sample rate range	Unrestricted
Complex support	Real


Name	in2
Description	Audio Input
Data type	{float, int, fract32}
Channel range	Unrestricted
Block size range	Unrestricted
Sample rate range	Unrestricted
Complex support	Real

Output Pins


Name	out1
Description	Audio output
Data Type	{float, int, fract32}


Name	out2
Description	Audio output
Data Type	{float, int, fract32}

Matlab Usage

File Name: alignment_delay_subsystem.m 
 SYS=alignment_delay_subsystem(NAME, N, OUTPUTDELAY) 
 Creates a subsystem that aligns the delay of all input channels. 
 The module has multiple input pins and the same number of output pins.  Each pin can 
 have a different number of channels, block size and sampling rate as long as they are real values in time domain.  
 The module aligns the accumulated output delay of all output pins to the 
 maximum accumulated input delay over all input pins if outputDelayMs 
 argument is empty. If outputDelayMs argument has a value and it is equal 
 or larger than the maximum accumulated input delay, it will align all 
 accumulated output delays to outputDelayMs. 

 Arguments: 
   NAME - name of the subsystem 
   N - number of input pins. 
   OUTPUTDELAY - the accumulated output delay in ms that all output are aligned with. If it's 
   empty the output delay will be aligned to the maximum of all 
   accumulated input delays. It has to be equal or larger than the maximum 
   accumulated input delay.