Problem sound-image?

Question

LuS 2015-10-19

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/249460-problem-sound-image

评论： LuS 2015-10-19

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Hi All,

I am struggling a bit with a script that I would like to create for my experiment:

a sound is played and 1 sec after the end of the sound an image is displayed on the screen for 3 secs.

Does anybody have the solution to my problem?

Please :)

Many thanks!!

%Open the screen
   [wPtr,rect]=Screen('OpenWindow',max(Screen('Screens')),[], [0 0 900 900]); 
   xCenter=rect(3)/2;
   yCenter=rect(4)/2;
    %Create textures
    srcFiles = dir('c:/Users/LuS/Desktop/Project1/Images/*.jpg');  % the folder in which the images exists
    for i = 1 : length(srcFiles)
        Images = strcat('c:/Users/LuS/Desktop/Project1/Images/*.jpg',srcFiles(i).name);
        I = imread(Images);
        figure, imshow(I);
        Screen('DrawTexture',wPtr,[], Images);
        Screen('Flip',wPtr,[], Images);
        [imageHeight, imageWidth,colorChannels]=size(Images);
        gap=100; %distance of pics from center
        leftRect=[xCenter-gap-imageWidth, yCenter-imageHeight/2, xCenter+imageHeight/2];
        rightRect=[xCenter+gap, yCenter-imageHeight/2, xCenter+gap+imageWidth, yCenter+imageHeight/2];
        textures=[filelist];
        textureNames={filelist};
    end
    %Read sounds
    filelist=dir('c:/Users/LuS/Desktop/Project1/Sounds/*.wav');  % the folder in which the sounds exists
    for K=1:numel(filelist)
      [data,Fs]=wavread(filelist(i).name);
      result(i)=your_action(data,Fs);
    end

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Walter Roberson 2015-10-19

You appear to be using the third party psychometric toolbox. The methods for displaying images in it are beyond our scope. Someone might happen to know, but it might take a while before anyone who knows happens to read the question.

My understanding is that the third party toolbox has an active mailing list.

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Answer 1

Image Analyst 2015-10-19

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/249460-problem-sound-image#answer_196559

Are you asking how to clip your sounds to a maximum of 1 second? And how to play them with sound() or soundsc()?

And I'd guess that you'd need to put your sound playing code inside your loop over all images (rather than a separate loop after it), along with a pause(3) after you've displayed the image.

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LuS 2015-10-19

Hi,

Thank you for your reply. I would like to play the sound while the screen is grey and 1 second after the end of the sound, an image appears on the screen for 3 seconds.

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