Currently saving video to avi file. Can I add audio to the file?

I currently am successfully recording video to an avi file. I would like to record audio and add it to the same file. Is this possible?

%Create a video input object for the logitech webcam
vid = videoinput('winvideo',1 );

%Create an audio input object for the computer's microphone
audio = audiorecorder(sps,16,1,4);
%audio
record(audio);

% Grab every frame
set(vid,'FrameGrabInterval',1);

% Specify a trigger to fire (specifically, fire a trigger after 100 frames)
set(vid, 'FramesPerTrigger', 100);

% Get a file name 
Today     = datestr(now, 'dd-mm-yyyy');
data_file = strcat(dataFolder, Today, '.avi');

% Create an AVI file object to hold the frames
avi = avifile(data_file,'fps',15, 'compression', 'none'); 

% Log the images
set(vid,'LoggingMode','disk');  % Log to disk
set(vid,'DiskLogger',avi);      % Log the disk to the AVI file object

% Start the video input object
start(vid);

% Wait (i.e., block) for the given amount of time or until a trigger is 
% fired (whichever comes first). In this case, the trigger 
% will be fired after 100 frames.
%
% Note that other MATLAB code can be executing since the 
% Image Acquisition Toolbox runs in another thread of execution
wait(vid,20);  % Could use Inf

% After the trigger is fired...

% Get the AVI object
avi = get(vid,'DiskLogger');

% Close the AVI file
avi = close(avi);

% Free the hardware resources associated with the video input
delete(vid);
stop(audio);
% Remove the video object from the workspace
clear vid;

Answer 1

[Walter Roberson]

Only the Computer Vision Toolbox has the capability of working with combined audio and video.

[Brittany]

So I do have that toolbox. Can I have details, please?

[Walter Roberson]

http://www.mathworks.com/help/vision/ref/tomultimediafile.html

http://www.mathworks.com/help/vision/ref/vision.videofilewriter-class.html