Can you add an event listener to triggered audio?

Well, I didn't use CpExtra (we are just about to upgrade to C9 and haven't explored that yet) but you gave me the answer by suggesting putting the duration in a variable. I already had a function to insert "alternative" CC text associated with the triggered audio into the default CC box. I've just extended it to include a timer that "clicks" the "Stop Audio" button (which hides itself, which is what I was after). Thanks!

window.aTimeout;

function createAltCC(cc, t) {

  window.clearTimeout(window.aTimeout);

  var ccTxt = $('#ccText').find('p')[0];//link to default CC text element

  if(!$(ccTxt).hasClass('hideCPel')) {

  $(ccTxt).addClass('hideCPel');

  }

  $('#altCCtxt').remove();//remove previous CCs

  var altCCtxt=document.createElement('p');

  $('#ccText').prepend(altCCtxt);

  altCCtxt.id='altCCtxt';

  altCCtxt.innerHTML=cc;

  if(t) {

  var i=0;

  window.setTimeout(audioPopTimer, 1800);

  }

  function audioPopTimer() {

  if(t>i) {

  i+=1;

  window.aTimeout=window.setTimeout(audioPopTimer, 1000);

  } else {

  //'clicks' the stop audio button

  window.cp.runJavascript(cp.model.data.btn_stopAudioPops.oca);

  }//end if

};//end audioPopTimer

};//end createAltCC

The button that triggers the audio executes this code (in addition to some other actions):

CCtxt='This is the CC text for my triggered audio clip, which is 18 seconds in duration.';

createAltCC(CCtxt, 18);

*that CSS class hideCPel has to be added to the course with the styles, display:none !important; opacity: 0;