How do i mix two audio signals in GUI and Update the UI?

This is how my GUI looks. What I would like to do is, mix and save the two audio together by pressing the button Mix. I have shared my app if you can please have a look. I know how to join them with audios from same directory but with the GUI i am having trouble.

Answer 1

[Cris LaPierre]

See this post on how to mix audio signals:

https://www.mathworks.com/matlabcentral/answers/170488-how-to-mix-two-audio-signals

The challenge here is guaranteeing that the signals are both the same length, or correctly handling them if they are not.

Save using audiowrite.

[Rezaul Reza]

could not work it out... i tried to add the both values after assigning them to to 2 variables.

Could you please describe with my app context.

App code attached with the post.

Thanks in advance!

[Cris LaPierre]

Could not work what out? What values did you try adding? What variables did you assign them to? Share the code you have tried. If it is in the mlapp file you have attached, what lines of code should I look at?

The easier you make it for us to help, the more likely you are to get an answer.

[Rezaul Reza]

[y,fs]=audioread( app.IMPORTEditField.Value);
y2=audioread( app.IMPORTEditField_2.Value);

joined = [y;y2];

[file,path]=uiputfile('.wav','Save', 'new'); % Opens up a file browser box to select the save location of the mixed audio
if isequal(file,0) || isequal(path,0)
    % If the save operation was cancelled by the user
    return
else       
    filename = fullfile(path, file); % Get the full location of the path as well as the file name to save the audio
    audiowrite(filename,joined,fs); % Save the audio in the path with the specific sample rate. 
    msgbox('File saved successfully', 'Success'); 
end

[Rezaul Reza]

that's how i am adding music. But the problem is i want them to play at the same time. Currently, once the first trackj finishes then the 2nd one starts(in the merged audio file)

[Cris LaPierre]

Yup, because that is what you have coded.

joined = [y;y2];

That code appends y2 to the bottom of y. Again, see this post on how to mix audio signals:

https://www.mathworks.com/matlabcentral/answers/170488-how-to-mix-two-audio-signals