выражение

freq = 3;

decay = 5;

maxDelay = 1.0;

seedRandom(textIndex,true);

myDelay = random(maxDelay);

t = time - (inPoint + myDelay);

startVal = [100,100];

endVal = [0,0];

dur = 0.1;

if (t < dur){

 linear(t,0,dur,startVal,endVal);

}else{

 amp = (endVal - startVal)/dur;

 w = freq*Math.PI*2;

 endVal + amp*(Math.sin((t-dur)*w)/Math.exp(decay*(t-dur))/w);

}