If I load 2 different music , after loading both , the UIAxes becomes the same, how do i fix this?

So,

If i load 2 different music afte the 2nd import the Axes becomes the same as the first imported music.

Code involved in importing and playing tracks:

  % Button pushed function: browse1
        function browse1Pushed(app, event)
            [filename,pathname]=uigetfile({'*.wav;*.mp3;'},'Choose file');
            app.IMPORTEditField.Value=strcat(pathname,filename);
            [app.y,Fs]=audioread(app.IMPORTEditField.Value);
            app.player=audioplayer(app.y,Fs);
           
             app.leftChannel = app.y(:, 1); 
             app.rightChannel = app.y(:, 2); 


            info=audioinfo(app.IMPORTEditField.Value);

            app.timeinseconds=0:seconds(1/Fs):seconds(info.Duration);
            app.timeinseconds=app.timeinseconds(1:end-1);
            
            app.Bps=info.BitsPerSample;
            app.totalsample=info.TotalSamples;
            app.NumOfChannels=info.NumChannels;
            app.samplerate=info.SampleRate;
            app.totalduration=info.Duration;
           
            current=get(app.player,'CurrentSample');
            app.Label_12.Text=char(app.timeinseconds(current));
            app.Label_3.Text=string(app.Bps(current));
            app.Label_5.Text=string(app.NumOfChannels(current));
            app.Label_4.Text=string(app.totalsample(current));
            app.Label_2.Text=string(app.samplerate(current));
            app.Label.Text=string(app.totalduration(current));
% 
             

%             axes(ap);
%             plot(app.leftChannel);

            plot(app.UIAxes,app.timeinseconds,app.y,'b',[-seconds(0.2) app.timeinseconds(end)], [0 0],'k',[app.timeinseconds(current) app.timeinseconds(current)],[min(min(app.y)) max(max(app.y))],'y');
            xlim(app.UIAxes,[-seconds(0.2) app.timeinseconds(end)]);
            ylim(app.UIAxes,[min(min(app.y)) max(max(app.y))]);
            app.DJMIXERVERSION10UIFigure.Visible='off';
            app.DJMIXERVERSION10UIFigure.Visible='on';

        end
        
% % % % % % % % % %         Callback to Play Music 1
 % Button pushed function: play1
        function play1Pushed(app, event)
            play(app.player);
            current=get(app.player,'CurrentSample');
            app.Label_12.Text=char(app.timeinseconds(current));
            drawnow;

            plot(app.UIAxes,app.timeinseconds,app.y,'b',[-seconds(0.2) app.timeinseconds(end)], [0 0],'k',[app.timeinseconds(current) app.timeinseconds(current)],[min(min(app.y)) max(max(app.y))],'y');
            xlim(app.UIAxes,[-seconds(0.2) app.timeinseconds(end)]);
            ylim(app.UIAxes,[min(min(app.y)) max(max(app.y))]);

            while app.timeinseconds(current)~=app.timeinseconds(end)
              current=get(app.player,'CurrentSample');
            app.Label_12.Text=string(app.timeinseconds(current));
            plot(app.UIAxes,app.timeinseconds,app.y,'b',[-seconds(0.2) app.timeinseconds(end)], [0 0],'k',[app.timeinseconds(current) app.timeinseconds(current)],[min(min(app.y)) max(max(app.y))],'y');
            xlim(app.UIAxes,[-seconds(0.2) app.timeinseconds(end)]);
            ylim(app.UIAxes,[min(min(app.y)) max(max(app.y))]);
            drawnow;
%             pause(0.1);
            end

        end

Below is the code involved with loading the 2nd track

% Button pushed function: browse2
        function browse2Pushed(app, event)
            [filename,pathname]=uigetfile({'*.wav;*.mp3;'},'File Selector');
            app.IMPORTEditField_2.Value=strcat(pathname,filename);
            [app.y,Fs]=audioread(app.IMPORTEditField_2.Value);
            app.player2=audioplayer(app.y,Fs);
            info=audioinfo(app.IMPORTEditField_2.Value);
 
            app.leftChannel = app.y(:, 1); 
            app.rightChannel = app.y(:, 2); 
            app.timeinseconds=0:seconds(1/Fs):seconds(info.Duration);
            app.timeinseconds=app.timeinseconds(1:end-1);
            
            app.Bps=info.BitsPerSample;
            app.totalsample=info.TotalSamples;
            app.NumOfChannels=info.NumChannels;
            app.samplerate=info.SampleRate;
            app.totalduration=info.Duration;
           
            current=get(app.player2,'CurrentSample');
            app.Label_9.Text=char(app.timeinseconds(current));
            app.Label_7.Text=string(app.Bps(current));
            app.Label_11.Text=string(app.NumOfChannels(current));
            app.Label_6.Text=string(app.totalsample(current));
            app.Label_10.Text=string(app.samplerate(current));
            app.Label_8.Text=string(app.totalduration(current));
 
            app.leftChannel = app.y(:, 1); 
            app.rightChannel = app.y(:, 2); 


            plot(app.UIAxes_2,app.timeinseconds,app.y,'b',[-seconds(0.2) app.timeinseconds(end)], [0 0],'k',[app.timeinseconds(current) app.timeinseconds(current)],[min(min(app.y)) max(max(app.y))],'y');
            xlim(app.UIAxes_2,[-seconds(0.2) app.timeinseconds(end)]);
            ylim(app.UIAxes_2,[min(min(app.y)) max(max(app.y))]);
            app.DJMIXERVERSION10UIFigure.Visible='off';
            app.DJMIXERVERSION10UIFigure.Visible='on';
        end

        % Button pushed function: play2
        function play2Pushed(app, event)
            play(app.player2);
            current=get(app.player2,'CurrentSample');

            app.Label_9.Text=char(app.timeinseconds(current));
            drawnow;

            plot(app.UIAxes_2,app.timeinseconds,app.y,'b',[-seconds(0.2) app.timeinseconds(end)], [0 0],'k',[app.timeinseconds(current) app.timeinseconds(current)],[min(min(app.y)) max(max(app.y))],'y');
            xlim(app.UIAxes_2,[-seconds(0.2) app.timeinseconds(end)]);
            ylim(app.UIAxes_2,[min(min(app.y)) max(max(app.y))]);

% ax.Color = 'blue';ax.Color = 'blue';            



 while app.timeinseconds(current)~=app.timeinseconds(end)
            current=get(app.player2,'CurrentSample');
            app.Label_9.Text=string(app.timeinseconds(current));
            plot(app.UIAxes_2,app.timeinseconds,app.y,'b',[-seconds(0.2) app.timeinseconds(end)], [0 0],'k',[app.timeinseconds(current) app.timeinseconds(current)],[min(min(app.y)) max(max(app.y))],'y');
            xlim(app.UIAxes_2,[-seconds(0.2) app.timeinseconds(end)]);
            ylim(app.UIAxes_2,[min(min(app.y)) max(max(app.y))]);
            drawnow;
%             pause(0.1);
  end

        end

Notice:

These are two different music.

My concern is, sometimes the stated problem does not happen.

Once I upload the 2nd track regardless of the serial(either track1 or track 2), i am facing these issues.

When i merge the both audio and load it, the UIAxeses are fixed.

Answer 1

[Cris LaPierre]

Because you are using the same variable name to capture the imported track in both browse1 and browse2 functions, namely app.y. You also plot app.y in both your play1 and play2 functions. The variable app.y will only hold the information of the last audio track loaded. Since your workflow is likely to first load both tracks then play them, you will see the same data in both plots.

function browse1Pushed(app, event)
    ...
    [app.y,Fs]=audioread(app.IMPORTEditField.Value);
    %^^^^^
    ...
end

function play1Pushed(app, event)
    ...
    plot(app.UIAxes,app.timeinseconds,app.y,...
    %                                 ^^^^^
    ...
end

function browse2Pushed(app, event)
    ...
    [app.y,Fs]=audioread(app.IMPORTEditField_2.Value);
    %^^^^^
    ...
end

function play2Pushed(app, event)
    ...
    plot(app.UIAxes_2,app.timeinseconds,app.y,'b',...
    %                                   ^^^^^
    ...
end

[Rezaul Reza]

I changed the name of the play2 and play master to y2 and y3 respectively and replaced all the related app.y accordingly.

Now I am getting

Error using plot
Vectors must be the same length.

[Rezaul Reza]

To me more specific,

I am getting error on this line for all the other play features

 plot(app.UIAxes,app.timeinseconds,app.y,'b',[-seconds(0.2) app.timeinseconds(end)], [0 0],'k',[app.timeinseconds(current) app.timeinseconds(current)],[min(min(app.y)) max(max(app.y))],'y');

Error Message:

Error using plot
Vectors must be the same length.

[Cris LaPierre]

You have the same problem with app.timeinseconds as you did with app.y - you use the same variable name in both browse1 and browse2 functions, and play1 and play2 functions, so you only ever have one. You likely need one for each file.

What the error is saying is that app.timeinseconds and app.y are not the same length. Even if you given app.timeinseconds a unique name for each file, there is another scenario to address: when you trim app.y, make sure you are also trimming app.timeinseconds.

I might look into using a structure array to store these parameters so I don't have to keep coming up with new variable names for the same thing.

In browse1 you could do

[app.file(1).y,Fs]=audioread(app.IMPORTEditField.Value);
...
app.file(1).timeinseconds=0:seconds(1/Fs):seconds(info.Duration);
app.file(1).timeinseconds=app.timeinseconds(1:end-1);

Then in browse2 you would just change the 1s to 2s

[app.file(2).y,Fs]=audioread(app.IMPORTEditField.Value);
...
app.file(2).timeinseconds=0:seconds(1/Fs):seconds(info.Duration);
app.file(2).timeinseconds=app.timeinseconds(1:end-1);

The same for play1, etc.

plot(app.UIAxes,app.file(1).timeinseconds,app.file(1).y,'b',[-seconds(0.2) app.file(1).timeinseconds(end)], [0 0],'k',[app.file(1).timeinseconds(current) app.file(1).timeinseconds(current)],[min(min(app.file(1).y)) max(max(app.file(1).y))],'y');

[Cris LaPierre]

Try running it and see what happens.

[Cris LaPierre]

NOTE: OP's comment posted as an Answer. Moving it here.

This is what i am getting after importing the music.

as soon as i import, this comes up

[Cris LaPierre]

I would have expected a different error message. I would have expected an error about unrecognized field name 'y'. It looks like you may need to update the properties defined in your app.

Remind me again - what is the name of the variable you load the audio data to?

[Rezaul Reza]

its the app.y.

app.file(1).y

[Rezaul Reza]

I have attcahed the code if you can have a look, please.

[Cris LaPierre]

its the app.y.

app.file(1).y

Those are two different variables, or more accurately stated, two different fields in the app structure. They are not the same thing. Given the changes you have made, you should no longer be using app.y anywhere. Remove it from your app properties so that cases like this throw an error.

You should be using app.file(1).y:

app.file(1).leftchannel = app.file(1).y(:,1)

[Rezaul Reza]

jolly good. It worked, Thanks