CrossFader

Overview

Cross fader

Discussion

The Cross Fader module mixes two signals according to a Control value. The module has three inputs. The Control is implemented in first which is a scalar value from 0 to 1. The other two inputs are the audio inputs A and B. The output corresponds to the weighted addition of signals A and B according to the Control value. If the Control is 0, then the output equals A. If the Control equals 1, the output equals B.

Module Pack

Standard

ClassID

classID = 18

Type Definition

typedef struct _ModuleCrossFader
{
ModuleInstanceDescriptor instance;            // Common Audio Weaver module instance structure
FLOAT32 smoothingTime;                        // Time constant of the smoothing process
INT32 mixType;                                // Selects the type of curve: Linear=0, Energy=1.
FLOAT32 currentGainA;                         // Instantaneous gain applied to channel A.
FLOAT32 currentGainB;                         // Instantaneous gain applied to channel B.
FLOAT32 smoothingCoeff;                       // Smoothing coefficient
} ModuleCrossFaderClass;

Variables

Properties

Name	Type	Usage	isHidden	Default Value	Range	Units
smoothingTime	float	parameter	0	10	0:1000	msec
mixType	int	parameter	0	0	0:1
currentGainA	float	state	1	0.5	0:1
currentGainB	float	state	1	0.5	0:1
smoothingCoeff	float	derived	1	0.002081	Unrestricted

Pins

Input Pins


Name	g
Description	cross-fader value
Data type	float
Channel range	1
Block size range	Unrestricted
Sample rate range	Unrestricted
Complex support	Real


Name	inA
Description	audio input A
Data type	float
Channel range	Unrestricted
Block size range	Unrestricted
Sample rate range	Unrestricted
Complex support	Real


Name	inB
Description	audio input B
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: cross_fader_module.m 
 M=cross_fader_module(NAME) 
 Creates a cross fader module for Audio Weaver. 

 Arguments: 
    NAME - name of the module.