Sound Code in void draw makes me problem

Processing Libraries
9

Now the game don’t block, but I became the same message in the console and I don’t know how I can’t put the soundfile1.play(); and the soundfile2.play(); in the void draw.

void setup(){
  positions_array = new float [blur_anzahl][2];
  spieler_x = 20;
  spieler_y = 353;
  ball_x = 450;
  ball_y = 350;
  ball_geschwindigkeit_x = - 4;
  ball_geschwindigkeit_y = 0;
  runde = 0;
  size (900, 700);
  rectMode(CENTER);
  bg = loadImage("pong_bg.png");    //Hintergrundbild
  noStroke();
  schrift = loadFont("burbank30.vlw");
  textFont(schrift);
  
  //Sound
  soundfile1 = new SoundFile(this, "plop.mp3");
  soundfile2 = new SoundFile(this, "game_over.mp3");
}

void draw(){
  background(bg);
  rect(spieler_x, spieler_y, 20, 100);
  rect(ball_x, ball_y, 10 ,10);
  
  //Blur-Effekt
  for(int i = (blur_anzahl - 1); i > 0; i--){
    fill(255, 0, 0, 255/(i*2));
    positions_array[i][0] = positions_array[i-1][0];
    positions_array[i][1] = positions_array[i-1][1];
    rect(positions_array[i][0], positions_array[i][1], 10 ,10);
  }
  positions_array[0][0] = ball_x;
  positions_array[0][1] = ball_y;
  fill(200, 0, 0, 255);
 
  
  if(keyPressed){
    if(keyCode == DOWN){
      if(spieler_y < 650){
        spieler_y = spieler_y + 5;
      }
    }
    if(keyCode == UP){
      if(spieler_y > 50){  
        spieler_y = spieler_y - 5;
      }
    }
  }
  ball_x = ball_x + ball_geschwindigkeit_x;
  ball_y = ball_y + ball_geschwindigkeit_y;
  
  //This is when then ball touches the player
  if(ball_x < 30){
    if(ball_y < (spieler_y + 55) && ball_y > (spieler_y - 55)){
      soundfile1.play();    //Sound
      ball_geschwindigkeit_x = (-ball_geschwindigkeit_x) + 1;
      ball_geschwindigkeit_y = ball_geschwindigkeit_y - (spieler_y - ball_y) * 0.1;
      runde = runde + 1;
    }else{
       soundfile2.play();    //Sound
       ball_x = 450;
       ball_y = 350;
       ball_geschwindigkeit_x = - 4;
       ball_geschwindigkeit_y = 0;
       runde = 0;
       spieler_y = 353;