LinSmooth

Overview

Linear Smoothing with separate Up/Down time constants

Discussion

This module restricts the rate of change of a signal in a linear fashion. It computes the steps by calculating the delta between the current and the target value and its rate defined by a time constant. Different smoothing times for up- and down stepping can be defined.

Module Pack

awe-mod-dspc-snd

ClassID

classID = 41803

Type Definition

typedef struct _ModuleLinSmooth
{
ModuleInstanceDescriptor instance;            // Common Audio Weaver module instance structure
FLOAT32 smoothingTimeUp;                      // Smoothing Time Up in ms
FLOAT32 smoothingTimeDown;                    // Smoothing Time Down in ms
FLOAT32 slewDown;                             // State variables.  One per channel
FLOAT32 slewUp;                               // State variables.  One per channel
FLOAT32 slewStepsUp;                          // Inverse of slew
FLOAT32 slewStepsDown;                        // Inverse of slew
FLOAT32* state;                               // State variables.  One per channel
FLOAT32* slew;                                // State variables.  One per channel
INT32* counter;                               // State variables.  One per channel
FLOAT32* targetValue;                         // Ramping target value
} ModuleLinSmoothClass;

Variables

Properties

Name	Type	Usage	isHidden	Default Value	Range	Units
smoothingTimeUp	float	parameter	0	20	0:10000	msec
smoothingTimeDown	float	parameter	0	20	0:10000	msec
slewDown	float	state	0	0.001042	Unrestricted
slewUp	float	state	1	0.001042	Unrestricted
slewStepsUp	float	derived	1	960	Unrestricted
slewStepsDown	float	derived	1	960	Unrestricted
state	float*	state	1	[1 x 1]	Unrestricted
slew	float*	state	1	[1 x 1]	Unrestricted
counter	int*	state	1	[1 x 1]	Unrestricted
targetValue	float*	state	1	[1 x 1]	Unrestricted

Pins

Input Pins


Name	in
Description	Audio In
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

Matlab Usage

File Name: lin_smooth_module.m