Multichannel Audio Input and Output

Acquire multichannel audio data and generate signals with Windows^® sound cards

Before you use audio channels, see Data Acquisition Toolbox Supported Hardware.

Functions

`addinput`	Add input channel to device interface
`addoutput`	Add output channel to device interface
`removechannel`	Remove channel from device interface

Topics

Audio Input and Output
Acquire and generate audio signals using one or more device channels.

Featured Examples

Acquire Continuous Audio Data

Set up a continuous audio acquisition using a microphone.

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Generate Audio Signals

Generate audio signals using a 5.1 channel sound system.

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Set up continuous audio generation using multiple audio channels. The signal, a sample of Handel's "Hallelujah Chorus", is broken up into contiguous segments and played back in two parts. The first part of the example plays each segment on a single speaker and a sub-woofer. The second part plays each segment on a different set of speakers (a choir of voices).

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Create an Echometer Using Audio Measurements

Create an echometer sonar using audio data acquisition and signal processing, which can measure distance by determining the time of flight of a sound pulse reflected off of a surface.

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Create an App for Analog Triggered Data Acquisition

Create an analog-triggered data acquisition app by using Data Acquisition Toolbox™ and App Designer.

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Analog Triggered Data Acquisition Using Stateflow Charts

Create an analog-triggered data acquisition app by using Stateflow®, Data Acquisition Toolbox™, and App Designer.

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Create an App for Live Data Acquisition

Create an app which acquires data from a DAQ device or sound card, displays a live data view, and logs data to a MAT file.

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Impulse Response Measurement Using a NI USB-4431 Device

Measure an impulse response using a National Instruments™ (NI) USB-4431 sound and vibration device and the Impulse Response Measurer app.

Open Live Script