playing a nonstop audio file

how can i play an audio file without stopping kinda like a loop in app designer

[y,Fs] = audioread(app.files);

sound(y,Fs)

this will just play it once

Answer 1

[jibrahim]

You can use dsp.AudioFileReader with PlayCount set to Inf:

afr = dsp.AudioFileReader('speech_dft.mp3','PlayCount',Inf);
adw = audioDeviceWriter('SampleRate', afr.SampleRate);
while ~isDone(afr)
    audio = afr();
    adw(audio);
end

[Mohamed Turkmani]

ok but the sound plays from the beggining, i kinda want the sound to seem non stop, my sound is just a simple 3 secs file, i want it to continue without seeming that its repeated

[Mohamed Turkmani]

and is there a way to increase the volume of the audio in real time?

[Mohamed Turkmani]

Error using audioDeviceWriter/setup

A given audio device may only be opened once.

Error in audioDeviceWriter/setupImpl

Error in generate_App/SpinnerValueChanging (line 508)

adw(audio);

[jibrahim]

You can control the range of the signal you want to play with the ReadRange property:

afr = dsp.AudioFileReader('speech_dft.mp3','PlayCount',Inf,'ReadRange', [start finish]);

Increasing the volume can be done by simply multiplying 'audio' by a constant of your choice.

Regarding the error, in your app, first clear your workspace, then make sure the object afr is only created once (say in setup of your app) and then somply call it in the loop. Do not recreate every time in your loop.

[Mohamed Turkmani]

ok it is working the problem is when i press the button to increas the volume, it doesnt work in real time, it waits until the audio is done and repeats with the increased volume