Overview

Module with different time delay for each channel specified in milliseconds

Discussion

This time delay module has multiple input and multiple output channels. The delay of each output channel can be independently set by the currentDelayTime array. The initial number of channels is specified at construction time and this also equals the length of the currentDelayTime array. Actual size of the currentDelayTime is updated in the prebuild function. 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 delay time per channel is specified by the currentDelayTime array. The actual delay applied is in integer sample ammounts and so depends on the sample rate. delay = floor( currentDelay * SR ) / SR Delays can be adjusted at run-time. However, the module is not smoothly updating and you may get audible clicks when adjusting the currentDelay at run-time.

Type Definition

typedef struct _ModuleDelayNChanMsec
{
    ModuleInstanceDescriptor instance;            // Common Audio Weaver module instance structure
    FLOAT32 maxDelayTime;                         // Maximum delay, in milliseconds.
    INT32 stateHeap;                              // Heap in which to allocate memory. Used to pass the value to internal delaynchan module.
    INT32 maxDelay;                               // Max delay in samples. Used to pass the value to internal delaynchan module.
    FLOAT32* currentDelayTime;                    // Current delay, in milliseconds.
    awe_modDelayNChanInstance *delay; // Module with different time delay for each channel specified in samples
} ModuleDelayNChanMsecClass;

Variables

Properties

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, int, fract32}

MATLAB Usage

File Name: delaynchan_msec_module.m

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