FractionalDelayV2

Overview

Provides fractional delay

Discussion

This subsystem implements a delay module providing a fractional number of samples of delay. A delay of the form N.x may be specified where N is an integer number of samples and x is a float between 0.0 and 1.0. The N.x delay is achieved by cascading a sample delay module and a FIR filter. The FIR filter is designed to provide the fractional portion of the delay between 0.0 to 1.0. The delay of N.x samples can be set in real time with an inspector. Each time N.x is changed a new set of filter coefficients is computed, and the internal sample delay module is set to N. NOTE: The FIR filter itself has a delay of 20 samples. Thus this module has a minimum delay of 20 samples. This is shown on the inspector. Input and output data for this module are floating point.

Module Pack

Advanced

ClassID

classID = 1418

Type Definition

typedef struct _ModuleFractionalDelayV2
{
ModuleInstanceDescriptor instance;            // Common Audio Weaver module instance structure
INT32 maxDelay;                               // Maximum delay, in samples. The size of the delay buffer is maxDelay*numChannels.
FLOAT32 floatCurrentDelay;                    // total delay
awe_modDelayInstance *ConstantDelay; // Time delay in which the delay is specified in samplesawe_modFIRInstance *FIRmodule; // FIR filter } ModuleFractionalDelayV2Class;

Variables

Properties

Name	Type	Usage	isHidden	Default Value	Range	Units
maxDelay	int	const	0	300	Unrestricted	samples
floatCurrentDelay	float	parameter	0	20	20:321	Samples

Pins

Input Pins


Name	in
Description	Audio Input
Data type	float
Channel range	Unrestricted
Block size range	Unrestricted
Sample rate range	Unrestricted
Complex support	Real

Output Pins


Name	out
Description	Audio output
Data Type	float

Scratch Pins


Channel Count	1
Block size	32
Sample rate	48000

Matlab Usage

File Name: fractional_delay_v2_module.m 
 Create a subsystem that implements fractional delay module 
   ARGUMENTS: 
   NAME - name of the module. 
   MAXDELAY - maximum delay provided by the module.