Calling function with dynamic parameters

[mustafayukselaud]

Hi all,

I am having trouble with creating different audio sequences in a timeline using call-function. I have a function that performs well outside of call-function as long as notes are defined in the list array.

function sequencePlayer(note1, note2, note3, note4) {    
      var list = [C1, D2, E3, F4];      
      i++    
      if (i == list.length)     
      return i = -1;    
        list[i].addEventListener('ended', sequencePlayer);    
        list[i].play();    
    };

But when I empty the list array inside the function and try to pass different sequences - parameters within a call-function like this:

    var trial = {    
      type: 'call-function',    
      func: function() {    
        sequencePlayer(C1, D2, E3, F4)    
      }    
    };    
    timeline.push(trial);  

it only plays the first note (in this example C1) and then stops playing with giving -Uncaught TypeError: Cannot read property 'addEventListener' of undefined- error.

My main aim is to play different sequences through the test which will be defined in timeline variables like this and ask participants whether two sequences were identical or different:

timeline_variables: [    
          {stimulus1: function() {sequencePlayer(C1, D2, E3, F4)}, stimulus2: function {sequencePlayer( D2, C1, E3, F4)}, correct_response: 1},

Thanks,

Mustafa