Skip to content

Subtract

Overview

Subtracts the last input from all other inputs

Discussion

The subtract module subtracts the last input from all other inputs. With an N-pin input, the output will be N-1 pins, and the Nth input will have been subtracted from all other inputs. The number of channels in the input channels needs to be identical.

Module Pack

Standard

ClassID

classID = 66

Type Definition

typedef struct _ModuleSubtract
{
ModuleInstanceDescriptor instance;            // Common Audio Weaver module instance structure
} ModuleSubtractClass;

Pins

Input Pins

Name in1
Description Audio input
Data type float
Channel range Unrestricted
Block size range Unrestricted
Sample rate range Unrestricted
Complex support Real and Complex
Name in2
Description Audio input
Data type float
Channel range Unrestricted
Block size range Unrestricted
Sample rate range Unrestricted
Complex support Real and Complex

Output Pins

Name out1
Description Audio output
Data Type float

Matlab Usage

File Name: subtract_module.m 
 M=subtract_module(NAME, NUMIN) 
 Creates a multi-input subtract module for use in the Audio Weaver 
 environment.   

 Arguments: 
    NAME - name of the module. 
    NUMIN - number of input pins. 

Copyright (c) 2026 DSP Concepts, Inc.