How can I merge two audio files(MP3/WAV), to be able to hear them playing both together in the same time and in the right and left side of the headphones?

How can I merge two audio files, to be able to hear them playing both together in the same time and in the right and left sides of the headphones? I'm not sure I think it's called vertical Join or so?

-Note: I'm using playeraudio() on guide.

Answer 1

[Image Analyst]

If they are the same sampling frequency, can't you just average the two signals and play it?

Or did you want to hear one signal in the left side and the other in the right side? If so, just average the channels in each signal to produce a monochrome signal, then assign one mono signal to the first row of the sound matrix and the other mono signal to the second row of the sound matrix.

[Image Analyst]

Try this:

% Read in stock demo music shipped with MATLAB.
s1 = load('handel.mat')
yHandel = s1.y;
FsHandel = s1.Fs;
% soundsc(yHandel, FsHandel);

% Read in my wave file, attached to post.
s2 = load('GoofySound.mat')
ySound = s2.ySound;
FsSound = s2.FsSound;
% soundsc(ySound, FsSound);

% Compute average of the two amplitudes.
numElements = min([length(ySound), length(yHandel)])
yBoth = (ySound(1:numElements) + yHandel(1:numElements))/2;
% Play the average.
soundsc(yBoth, FsSound);

[New Matlab user]

what is this file (GoofySound.mat) is it like a library or so?

[Image Analyst]

Not that I know of. It's just one I've had hanging around for many many years.

Did the code work for you or not?

[New Matlab user]

yes it works, but the problem it's stop working when I try to use wav aduio files it showes me:- "Struct contents reference from a non-struct array object"

 thank you so much.

[Walter Roberson]

[filename1, directory1] = uigetfile('*.wav', 'Select first file')
[selected_file_info.y, selected_file_info.Fs] = audioreader( fullfile(directory1, filename1) );

[Image Analyst]

What is your code? What is the size of each individual sound file? Have you read this yet???

Do you know how to use the debugger?

[Walter Roberson]

One of those two, ySound or yHandel, is a row vector and the other is a column vector. You want both of them to be column vectors.

Also, pay attention to the number of channels in the data.

Answer 2

[Walter Roberson]

If they are both stereo, then

newdata = (data1 + data2)/2;

and play newdata.

If they are both mono and you want to hear one on the left and one on the right, then

newdata = [OneToPutOnLeft, OneToPutOnRight];

and play newdata.

[New Matlab user]

player=audioplayer(y,Fs)

-(data1) or (data2) are they like 'player' variable?

[Walter Roberson]

data1 and data2 are the contents of the audio files