MultiplexorControl

Discussion

THIS MODULE IS DEPRECATED AND NOT RECOMMENDED FOR NEW DESIGNS. PLEASE USE THE MultiplexorV2 MODULE INSTEAD.

Smoothly varying multiplexor module in which the channel to select is taken from a control pin (pin 1). The control pin is an integer value in the range 0 to N-1, where N is the number of audio inputs. If the control value is outside of the allowable range it is clipped. The first sample value of the control pin is used as the index for the multiplexor; all other values are ignored.

Each audio input pin must have the same number of channels and block size.

Note that this module has built in smoothing to prevent audible clicks.

Module Pack

Deprecated

ClassID

classID = 2026

Type Definition

typedef struct _ModuleMultiplexorControl
{
ModuleInstanceDescriptor instance;            // Common Audio Weaver module instance structure
FLOAT32 smoothingTime;                        // Time constant of the smoothing process
INT32 index;                                  // Value seen on the control pin.  Specifies which input pin to route to the output. The index is zero based.
FLOAT32 smoothingCoeff;                       // Smoothing coefficient
INT32 currentIndex;                           // This is index that is currently being used and the module smoothly transitions to index
FLOAT32 currentGain;                          // Instanteous gain being applied.  This is an internal variable used in the smoothing process
} ModuleMultiplexorControlClass;

Variables

Properties

Name	Type	Usage	isHidden	Default Value	Range	Units
smoothingTime	float	parameter	0	10	0:100	msec
index	int	state	0	0	0:1
smoothingCoeff	float	derived	1	0.002081	Unrestricted
currentIndex	int	parameter	1	0	Unrestricted
currentGain	float	state	1	1	Unrestricted

Pins

Input Pins


Name	Ctrl
Description	Control signal
Data type	int
Channel range	Unrestricted
Block size range	Unrestricted
Sample rate range	Unrestricted
Complex support	Real


Name	in1
Description	Input signal
Data type	float
Channel range	Unrestricted
Block size range	Unrestricted
Sample rate range	Unrestricted
Complex support	Real


Name	in2
Description	Input signal
Data type	float
Channel range	Unrestricted
Block size range	Unrestricted
Sample rate range	Unrestricted
Complex support	Real

Output Pins


Name	out
Description	Output signal
Data Type	float

Matlab Usage

File Name: multiplexor_control_module.m 
 M=multiplexor_control_module(NAME, NUMINPIN) 
 Smoothly varying multiplexor module with a control pin.  The control 
 pin is the first pin and determines which of N inputs is selected. 
 The input pin is an integer value in the range 0 to N-1.  Arguments: 
    NAME - name of the module. 
    NUMINPIN - number of input pins. 

 All input pins must have the same block size and number of channels.