MATLAB app designer not playing sounds

I am trying to excute the following lines with MATLAB app designer

[x, fs] = audioread('wave.wav');
 app.freq = 2 * fs; 
player = audioplayer(x, app.freq); 
play(player);

but no sound is produced. However, when I copy the above lines along with those lines,

restoredefaultpath
rehash toolboxcache
savepath

it sounds in the command window but not in the app designer.

How can I fix this issue? - TIA

Answer 1

[Subhadeep Koley]

I have attached one demo minimum working example.

Have a look. It might help you fix the issue.

Also, if possible provide the full path of the sound file when reading it with audioread()

[Adham Elkhouly]

Hi - thank you for replying

I wrote this line in the app designer 2019b and 2021a

which audioplayer

and I got these lines in the command boxes

C:\Program Files\MATLAB\R2019b\toolbox\matlab\audiovideo\@audioplayer\audioplayer.m

C:\Program Files\MATLAB\R2021a\toolbox\matlab\audiovideo\audioplayer.m

unfortunately, still no sound in app designer 2019b or 2021a

[Adham Elkhouly]

your file produced a sound, but

load

doesn't accept .wav files

[Subhadeep Koley]

Instead of load() you can use

[app.x, app.fs] = audioread('wave.wav');

[Adham Elkhouly]

audioread doesn't work. This is the entire function

 [filename, pathname]=uigetfile({'*.wav'},'File Selector');
  fullpathname = fullfile(pathname, filename);
try
   [app.x,app.fs] = audioread(fullpathname); %% handling exceptions in case you decide not to attach a folder
catch
            return  %% function terminates in case of an exception
  end
              app.wavFolderAvailableLamp.Color = 'g';
              app.freq = 2 * app.fs; 
              player = audioplayer(app.x, app.freq); 
              play(player);

Am I doing something I shouldn't?

[Subhadeep Koley]

Define a public property player and store the audioplayer object inside app.player.

Then invoke play(app.player)

[filename, pathname]=uigetfile({'*.wav'},'File Selector');
fullpathname = fullfile(pathname, filename);
try
    [app.x,app.fs] = audioread(fullpathname);
catch
    return
end
app.wavFolderAvailableLamp.Color = 'g';
app.freq = 2 * app.fs;
app.player = audioplayer(app.x, app.freq); % Here app.player is a public property variable
play(app.player);

Answer 2

[Adham Elkhouly]

For anyone facing a similar issue, I used

sound(app.x,app.freq);

instead of

player = audioplayer(app.x, app.freq); 
play(player);

[Subhadeep Koley]

@Adham Elkhouly I think, if you use sound(app.x, app.freq), then the audio clip will keep on playing even if you close the app window.

Whereas, using the below code, will stop the sound as soon as you close the app window.

app.player = audioplayer(app.x, app.freq);
play(app.player);

[Adham Elkhouly]

Yes, the sound keeps on with

sound()

and what you said works fine after I defined

player

as a public property - thank you very much