MATLAB Programming

Working with Audio and Video Data
Importing Audio/Video Data
MATLAB includes several functions that you can use to bring audio or video
data into the MATLAB workspace. Some of these functions read audio or
video data from files. Another way to import audio data into the MATLAB
workspace is to record it using an audio input device, such as a microphone.
The following sections describe
• “Reading Audio and Video Data from a File” on page 6-93
• “Recording Audio Data” on page 6-93
Reading Audio and Video Data from a File
MATLAB includes several functions for reading audio or video data from a
file. These files are format-specific.
• auread —Returns sound data from a sound (AU) file
• aviread —Returns AVI data as a MATLAB movie
• wavread —Returns sound data from a sound (WAV) file
Recording Audio Data
To bring sound data into the MATLAB workspace by recording it from an
audio input device, use the audio recorder object. This object represents
the connection between MATLAB and an audio input device, such as a
microphone, that is connected to your system. You use the audiorecorder
function to create this object and then use methods and properties of the
object to record the audio data.
On PCs running Windows,youcanalsousethewavrecord function to bring
live audio data in WAV format into the MATLAB workspace.
Once you import audio data, MATLAB supports several ways to listen to the
data. You can use an audio player object to play the audio data. Use the
audioplayer function to create an audio player object.
You can also use the sound or soundsc function.
On PCs running Windows, you can use the wavplay function to listen to .wav
files.
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