MATLAB: PLAY/STOP pushbutton

play stop

Hi!
I was wondering if anyone knows how to help me with this please.
Below is the code for a pushbutton that I am using to PLAY/STOP audio.
I need to be able to play and stop audio with the same button. That audio must be played in loop until the user pushes the button again. These two things the code is already doing.
My problem is: Once the user pushes the button and the audio stops, I need a way to allow the user to repeat the process as many times as he needs to by pushing the button again.
I understand why my code is not allowing me to repeat the process at the moment but I am not being able to think of a solution for what I need to do.
Thanks in advance for your help.
Cheers
% --- Executes on button press in playLOOP.
function playLOOP_Callback(hObject, eventdata, handles)
% hObject handle to playLOOP (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
%generates random file
persistent check1
if isempty(check1)
check1 = 1
wavFileToPlay = handles.myWavFiles{handles.wavFileIndex}; % this is just to give the code the ID of a random song from my playlist, that will be played now
[x, fs] = audioread(handles.wavFileToPlay);
pause (0.1);
sound (x,fs)
set(handles.playLOOP,'string','STOP');
pause (11);
else ~isempty(check1)
%check1 = []
clear sound;
set(handles.playLOOP,'string','PLAY');
end

Best Answer

  • The only known way to stop sound() from playing is to
    clear sound
    You should be looking at the pause() and resume() audioplayer methods, and you will need to use the audioplayer callbacks to detect end of sound to know to play() the object again in order to loop. There will generally be a delay in playing before the player restarts.
    I would suggest that you instead look at the Audio System Toolbox in order to be able to stream audio.