I want to make a music sampler with at least 4 sounds that can be triggered. The code below allows the sounds to play once. Right now it makes a static-y glitchy noise after the first playing of each sound. Also, it's playing on mouseover instead of click.

I've looked at all of the documentation but it's not helping. I'm guessing I need to do the close and stop code differently?

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import hypermedia.video.*;

import ddf.minim.*;
import ddf.minim.signals.*;
import ddf.minim.analysis.*;
import ddf.minim.effects.*;
//SUCCESS!

   PImage bass;
   PImage organ;
   PImage cymbal;
   PImage scream;

Minim minim;




AudioPlayer sound1;
AudioPlayer sound2;
AudioPlayer sound3;
AudioPlayer sound4;
 

void setup(){
   size(600,600);
   background(102, 102, 102);

minim = new Minim(this); 
sound1 = minim.loadFile("bass.mp3");
sound2 =  minim.loadFile("organ.wav");
sound3 =  minim.loadFile("bass.wav");
sound4 = minim.loadFile("scream.wav");

}

void draw(){



/* AudioPlayer sound1;
AudioPlayer sound2;
AudioPlayer sound3;
AudioPlayer sound4; */

mousePressed();
 
bass = loadImage("bass.png");
organ = loadImage("organ.gif");
scream = loadImage("scream.gif");
cymbal = loadImage("cymbal.gif");
  
image(bass, 0, 0);
image(organ, 0, 150);
image(scream, 320, 0);
image(cymbal, 0, 0);

}

void mousePressed(){
 
 if(mouseX > 0 && mouseX < 321 && mouseY > 0 && mouseY < 240)
 {
   sound1.play();
 }      
if(mouseX > 321 && mouseX < 640 && mouseY > 0 && mouseY < 239)
  {
    sound2.play();
  }  
if(mouseX > 0 && mouseX < 320 && mouseY > 240 && mouseY < 480)
   {
     sound3.play();
   }   
if(mouseX > 320 && mouseX < 640 && mouseY > 240 && mouseY < 480)
    {
      sound4.play();
    }  

}

void stop()
{
  // always close Minim audio classes when you are finished with them
  sound1.close();
  sound2.close();
  sound3.close();
  sound4.close();
 
  //isplaying
  // always stop Minim before exiting
  minim.stop();
 
  super.stop();
}