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.

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