Adding a beep cue before a specific location

Hi all, I have generated 5 different sounds in each block/trial I now need a pure tone cue to be generated in each block before the 5th sound is generated. How can i do that ? Please help.

    {function out = makeTrain(in)
    %in would be a list eg: [1 2 3 4 5;3 4 5 1 2; 2 3 4 1 5;...]

    wavdir = 'C:\sounds';

    out = [];

    % isi = 500ms

    isi = 500/1000 * 44100;

    isi = zeros(isi,1);

    cueTone = mktone(2500, 300,10,1000/44.1,1); 

    % this function generates a pure tone of f=2500 Hz, t=300 ms, 
    fs=44100 Hz

    cueTone = cueTone/max(cueTone);

    for idx = 1:length(in)

    switch in(idx)

    case 1

    wavfile = [wavdir 'ka.wav'];

    case 2

    wavfile = [wavdir 'pa.wav'];

    case 3           

    wavfile = [wavdir 'ga.wav'];

    case 4

    wavfile = [wavdir 'ba.wav'];

    case 5

    wavfile = [wavdir 'da.wav'];

    end

        snd = wavread(wavfile);

    if idx == 1

    out = snd;

    else
            out = [out;isi;snd];

        end

    end
    out = [??]
    end
      }

[Jan]

1. Please format your your code using the "{} Code" button on top of the edit box. More about formatting: see the "Markup" link on this page.

2. Do you have a question?

[imran]

Hi,

1) Sorry I am relatively new to this forum. I hope the formatting looks alright now.

2) Yes, I need help to generate the cue tone in each block before the fifth sound is played.

Answer 1

[Daniel Shub]

You have cueTone defined so all you need to do is add it to your snd array ...

    if idx == 1
      out = snd;
    elseif idx == 5
      out = [out;isi(1:(length(isi)/2), :);cueTone;isi(((length(isi)/2)+1):end, :);snd];
    else
      out = [out;isi;snd];
    end

I added it before the 5th sound halfway in between the isi, but you should be able to put it where ever you want.

[imran]

Thanks a lot, It works great.