How to play and stop audio file

I want to make a gui with two buttons play and stop audio file how can i do that

Answer 1

[EngEdgarHS]

I will show two different methods I know:

1º method

In function OpeningFCN contained in .m file created by figure of GUI, type:

[y, Fs] = audioread('your_audio_file.mp3');

Where y is the sampled data returned by reading the audio file and Fs is the sample rate for y. It's not necessary to be just audios in .mp3 or .wav.

In function Callback of the button created to play the song, type:

sound(y, Fs, nBits);

nBits usually is seted to 16 bits.

And then, in function Callback of the button created to stop the song, type:

clear sound;

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2º method

This method is the best, in my opinion. In function OpeningFCN contained in .m file created by figure of GUI, type:

[y, Fs] = audioread('your_audio_file.mp3');
player = audioplayer(y, Fs);

add four buttons in your figure: one for play, one for pause, one for resume and one for stop.

In function Callback of the button created to play the song, type:

play(player);

In function Callback of the button created to pause the song, type:

pause(player);

In function Callback of the button created to resume the song, type:

resume(player);

And in function Callback of the button created to stop the song, type:

stop(player);

P.S: Don't forget to declare variables as global.

Easy, don't? Regardles

[Walter Roberson]

global variables are error prone, and the slowest of all the variables.

http://matlab.wikia.com/wiki/FAQ#How_can_I_share_data_between_callback_functions_in_my_GUI.28s.29.3F

[EngEdgarHS]

Then, Fs and y don't need be global in first method? Interesting!

Thanks Walter.

[Rainaire Hansford]

Ok so the [y,Fs] method didn't work so am I missing something also I forgot how to make the buttons function lol

[Manoj Kumar]

many many thanks

[b]

How to adjust the volume so that one file plays at volume1 and the second file plays at volume2 ?

[zainab ne]

Where do I have to declare global y Fs ? I am extremely new to Matlab. It keeps producing an error “error while evaluating UIControl Callback” Help pls

[Walter Roberson]

In the code for the second approach, it would be player that you need to share, because you would create the player and start playing in one callback, and you need access to the player again in another callback in order to be able to stop or pause it.

http://matlab.wikia.com/wiki/FAQ#How_can_I_share_data_between_callback_functions_in_my_GUI.28s.29.3F