Overview
Mono x N-channel multiplier
Discussion
The AGCFract32 Multiplier is used to multiply N interleaved audio channels by a single mono audio signal. A common use for the AGCMultipler is in automatic gain control systems, where the gain signal is taken from the limiter core or gain computer module. Using a single (mono) gain control signal for a multichannel input ensures that the balance between the audio channels is maintained, and allows for sidechain processing.
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The user can multiply 0.75 with a shift of -1 and assume normal scaling and achieve a multiply of 1.5. A positive postShift can increase the dynamic range when multiplying with small numbers. It is up to the user to track all shifts in the layout.
Type Definition
| Code Block |
|---|
typedef struct _ModuleAGCMultiplierFract32
{
ModuleInstanceDescriptor instance; // Common Audio Weaver module instance structure
INT32 postShift; // Number of bits to shift
} ModuleAGCMultiplierFract32Class; |
Variables
Properties
Name | Type | Usage | isHidden | Default value | Range | Units |
postShift | int | parameter | 0 | 7 | 0:31 | postShift |
Pins
Input Pins
Name: g
Description: Gain to apply
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Sample rate range: Unrestricted
Complex support: Real
Output Pins
Name: out
Description: N-channel audio output signal
Data type: fract32
MATLAB Usage
File Name: agc_multiplier_fract32_module.m
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