Playing background music/noise

If you want to play a sound/music the whole time during the task, turn on the alert_function, as shown in this link, and write your alert_function.m as below. The wav file will be played during the ITI and even while the task is paused.

function alert_function(hook,MLConfig,TrialRecord)

persistent id
filename = 'noise.wav';  % change the filename appropriately

switch hook
    case 'init'          % when the [RUN] button is clicked
        id = mgladdsound(filename);
        mglsetproperty(id, 'looping',true, 'collective',false);
        mglplaysound(id);

    case 'fini'          % when the task window is closed
        mgldestroysound(id);
end

end