delay = .03;
myDelay = delay*textIndex;
t = (time - inPoint) - myDelay;
if (t >= 0){
  freq =2;
  amplitude = 50;
  decay = 6.0;
  s = amplitude*Math.cos(freq*t*2*Math.PI)/Math.exp(decay*t);
  [s,s]
}else{
  value
}