Overview
A smoothed mixer module with M outputs and N inputs
Discussion
This time delay module has multiple input and multiple output channels. Smoothed delay can be applied at each intersections of the input and output lines. The delays and gains to be applied at each intersection comes from the control pin. Delays are specified in milliseconds and are in the range of [0 MAXDELAY].
At construction time, you specify the maximum delay (maxDelay) of the module. The variable, maxDelay determines the size of the internal state buffer. The size of the internal state buffer equals (maxDelay+1)*numChannels samples. The module applies smooth cross fading when delay or gain values are changed at run-time.
Type Definition
Code Block |
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typedef struct _ModuleMultichannelMixerSmoothed { ModuleInstanceDescriptor instance; // Common Audio Weaver module instance structure FLOAT32 maxDelayTime; // Maximum delay, in milliseconds. FLOAT32 smoothingTimeDelay; // Time constant of the cross fading process of delay FLOAT32 smoothingTimeGain; // Time constant of the cross fading process of gain FLOAT32 smoothingCoeff; // Smoothing coefficient for cross fading of delays. FLOAT32 smoothingCoeffGain; // Smoothing coefficient for cross fading of gains. INT32 stateHeap; // Heap in which to allocate memory. INT32 maxDelay; // Max delay in samples. INT32* prevDelay; // Array holding previous delay values. INT32* currentDelay; // Array holding current delay values. FLOAT32* prevGain; // Array holding previous gain values. FLOAT32* currentGain; // Array holding current gain values. FLOAT32* oldGain; // Gain parameter for cross fading of delay. FLOAT32* newGain; // Gain parameter for cross fading of delay. INT32* fadingDone; // State variable to implement cross fading of delay. INT32* stateIndex; // Index of the oldest state variable in the array of state variables. FLOAT32* state; // State variable array. } ModuleMultichannelMixerSmoothedClass; |
Variables
Properties
Name | Type | Usage | isHidden | Default value | Range | Units |
maxDelayTime | float | const | 0 | 10 | 0:10 | msec |
smoothingTimeDelay | float | parameter | 0 | 10 | 0:1000 | msec |
smoothingTimeGain | float | parameter | 0 | 10 | 0:1000 | msec |
smoothingCoeff | float | derived | 1 | 0.002081 | Unrestricted | |
smoothingCoeffGain | float | derived | 1 | 0.002081 | Unrestricted | |
stateHeap | int | const | 1 | 561 | Unrestricted | |
maxDelay | int | const | 1 | 480 | Unrestricted | |
prevDelay | int* | state | 1 | [1 x 1] | Unrestricted | samples |
currentDelay | int* | state | 1 | [1 x 1] | Unrestricted | samples |
prevGain | float* | state | 1 | [1 x 1] | Unrestricted | samples |
currentGain | float* | state | 1 | [1 x 1] | Unrestricted | samples |
oldGain | float* | state | 1 | [1 x 1] | Unrestricted | |
newGain | float* | state | 1 | [1 x 1] | Unrestricted | |
fadingDone | int* | state | 1 | [1 x 1] | 0:1 | |
stateIndex | int* | state | 1 | [1 x 1] | Unrestricted | |
state | float* | state | 1 | [1 x 514] | Unrestricted |
Pins
Input Pins
Name: in
Description: audio input
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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
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Block size: 32
Sample rate: 48000
MATLAB Usage
File Name: multichannel_mixer_smoothed_module.m
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