Wait for sound to finish and then execute

Question

Adham Elkhouly 2021-4-27

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/814860-wait-for-sound-to-finish-and-then-execute

评论： Adham Elkhouly 2021-4-27

I am trying to create a lamp that turns green while the audio is playing and red after the audio is played. I wrote the following function

function PlayxnButtonPushed(app, event)
             if(app.wav_flag == 1 && app.yn_flag ==0)
            app.playingxnLamp.Color = 'g';
            app.player = audioplayer(app.x, app.fs); 
            play(app.player,app.fs);
            while( strcmp(app.player.running,'on') )
            app.xn_flag = 1;  % Waiting for sound to finish here
            end
            end
           app.xn_flag = 0;
           app.playingxnLamp.Color = 'r';
        end

But it creates huge lag that I have to terminate the program using task manager.

Any idea how to fix this?

Thank you

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Answer 1

Steven Lord 2021-4-27

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/814860-wait-for-sound-to-finish-and-then-execute#answer_686265

Instead of calling play on your audioplayer object you should call playblocking.

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Adham Elkhouly 2021-4-27

Thank you

Adham Elkhouly 2021-4-27

在 MATLAB Online 中打开

it intially worked but now I get an error that says Invalid or deleted object.

if(app.wav_flag == 1 && app.yn_flag ==0)
            app.playingxnLamp.Color = 'g';
            app.player = audioplayer(app.x, app.fs); 
            app.xn_flag = 1;
            playblocking(app.player,app.fs);
            app.playingxnLamp.Color = 'r'; %<-- here
             end