Overview

ST gain manager

Discussion

The GAM module allows the user to digitally modify the volume of the input signal in the [-80;0] dB range, with a granularity of 0.5 dB.

The module can handle mono, stereo and multichannel interleaved (up to eight channels) 32-bits I/O data.

The minimum input frame is 96 and the maximum input frame is 480 stereo samples.

Type Definition

typedef struct _ModuleSTGainManager
{
    ModuleInstanceDescriptor instance;            // Common Audio Weaver module instance structure
    INT32 nAPIResult;                             // Return status for last call into the ST API
    INT32 numChannels;                            // Number of channels
    FLOAT32* target_volume_dB;                    // Up to 8 channels of gain (-80 - 0) dB
    INT32* mute;                                  // mute
    void * pGlobals;                              // Points to the global variables structure
} ModuleSTGainManagerClass;

Variables

Properties

Name	Type	Usage	isHidden	Default value	Range	Units
nAPIResult	int	state	0	0	Unrestricted
numChannels	int	parameter	1	1	Unrestricted
target_volume_dB	float*	parameter	0	[1 x 1]	-80:0.5:0	dB
mute	int*	parameter	0	[1 x 1]	0:1:1
pGlobals	void *	const	1		Unrestricted

Pins

Input Pins

Name: in

Description: audio input

Data type: fract32

Channel range: 1:8

Block size range: 96:480

Sample rate range: Unrestricted

Complex support: Real

Output Pins

Name: out

Description: audio output

Data type: fract32

MATLAB Usage

File Name: st_gain_manager_module.m

 M = st_gain_manager_module(NAME)
 Audio Weaver wrapper for the ST Gain Manager module.  Arguments:
   NAME - name of the module.
 Copyright (c) 2017 DSP Concepts, Inc.  All Rights Reserved.
 Author:  Chris Perry

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(8.D.2.7) STGainManager

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