Hi! I'm trying to give to each imagebutton I've created, one specific sound, how can I? For now I've just imported one file, because more file seem to overlap eachothers....heeeelp!
 
import ddf.minim.*;

Minim minim;
AudioPlayer in;
ImageButtons button;
ImageButtons button1;
ImageButtons button2;
ImageButtons button3;
ImageButtons button4;
ImageButtons button5;
ImageButtons button6;
ImageButtons button7;
ImageButtons button8;
ImageButtons button9;
ImageButtons button10;
ImageButtons button11;
ImageButtons button12;


void setup()
{
  size(500, 313);
  background(loadImage("fusion.jpg"));
        minim = new Minim(this);
     
  // Costruttore primo pulsante
  PImage b = loadImage("fusion1_base.jpg");
  PImage r = loadImage("fusion1_ste.jpg");
  PImage d = loadImage("fusion2_ste.jpg");
  int x = 28;
  int y = 90;
  int w = b.width;
  int h = b.height;
  button = new ImageButtons(x, y, w, h, b, r, d);
// load a file, default sample buffer size is 1024
  in = minim.loadFile("0065.mp3");
 
  // Costruttore secondo pulsante
  PImage c = loadImage("fusion2_base.jpg");
  PImage e = loadImage("fusion3_ste.jpg");
  PImage f = loadImage("fusion4_ste.jpg");
  int x2 = 70;
  int y2 = 100;
  int w2 = c.width;
  int h2 = c.height;
  button1 = new ImageButtons(x2, y2, w2, h2, c, e, f);

 // Costruttore terzo pulsante
  PImage m = loadImage("fusion11_base.jpg");
  PImage n = loadImage("fusion11a_ste.jpg");
  PImage o = loadImage("fusion11_ste.jpg");
  int x3 = 135;
  int y3 = 85;
  int w3 = d.width;
  int h3 = d.height;
  button2 = new ImageButtons(x3, y3, w3, h3, m, n, o);

 
  // Costruttore quarto pulsante
  PImage p = loadImage("fusion22_base.jpg");
  PImage q = loadImage("fusion22a_ste.jpg");
  PImage s = loadImage("fusion22_ste.jpg");
  int x4 = 170;
  int y4 = 80;
  int w4 = e.width;
  int h4 = e.height;
  button3 = new ImageButtons(x4, y4, w4, h4, p, q, s);
 
  // Costruttore quinto pulsante
  PImage l = loadImage("fusion33_base.jpg");
  PImage z = loadImage("fusion33a_ste.jpg");
  PImage a = loadImage("fusion33_ste.jpg");
  int x5 = 200;
  int y5 = 70;
  int w5 = f.width;
  int h5 = f.height;
  button4 = new ImageButtons(x5, y5, w5, h5, l, z, a);
 
   // Costruttore secondo pulsante
  PImage g = loadImage("fusion4_base.jpg");
  PImage t = loadImage("fusion4a_ste.jpg");
  PImage i = loadImage("fusion44_ste.jpg");
  int x6 = 235;
  int y6 = 120;
  int w6 = e.width;
  int h6 = e.height;
  button5 = new ImageButtons(x6, y6, w6, h6, g, t, i);
  
     // Costruttore secondo pulsante
  PImage v = loadImage("fusion5_base.jpg");
  PImage wa = loadImage("fusion5a_ste.jpg");
  PImage j = loadImage("fusion5_ste.jpg");
  int x7 = 285;
  int y7 = 110;
  int w7 = f.width;
  int h7 = f.height;
  button6 = new ImageButtons(x7, y7, w7, h7, v, wa, j);
 
     // Costruttore secondo pulsante
  PImage ma = loadImage("fusion6_base.jpg");
  PImage na = loadImage("fusion6a_ste.jpg");
  PImage sa = loadImage("fusion6_ste.jpg");
  int x8 = 310;
  int y8 = 110;
  int w8 = g.width;
  int h8 = g.height;
  button7 = new ImageButtons(x8, y8, w8, h8, ma, na, sa);
 
     // Costruttore secondo pulsante
  PImage la = loadImage("fusion7_base.jpg");
  PImage ga = loadImage("fusion7a_ste.jpg");
  PImage ta = loadImage("fusion7_ste.jpg");
  int x9 = 350;
  int y9 = 85;
  int w9 = f.width;
  int h9 = f.height;
  button8 = new ImageButtons(x9, y9, w9, h9, la, ga, ta);
 
     // Costruttore secondo pulsante
  PImage ba = loadImage("fusion8_base.jpg");
  PImage ra = loadImage("fusion8a_ste.jpg");
  PImage da = loadImage("fusion8_ste.jpg");
  int x10 = 375;
  int y10 = 75;
  int w10 = g.width;
  int h10 = g.height;
  button9 = new ImageButtons(x10, y10, w10, h10, ba, ra, da);

     // Costruttore secondo pulsante
  PImage pa = loadImage("fusion9_base.jpg");
  PImage qa = loadImage("fusion9a_ste.jpg");
  PImage xa = loadImage("fusion9_ste.jpg");
  int x11 = 285;
  int y11 = 110;
  int w11 = m.width;
  int h11 = m.height;
  button10 = new ImageButtons(x11, y11, w11, h11, pa, qa, xa);
 
     // Costruttore secondo pulsante
  PImage ca = loadImage("fusion10_base.jpg");
  PImage fa = loadImage("fusion10a_ste.jpg");
  PImage ha = loadImage("fusion10_ste.jpg");
  int x12 = 430;
  int y12 = 100;
  int w12 = i.width;
  int h12 = i.height;
  button11 = new ImageButtons(x12, y12, w12, h12, ca, fa, ha);
 
      // Costruttore secondo pulsante
  PImage mi = loadImage("fusion10_base.jpg");
  PImage ni = loadImage("fusion10a_ste.jpg");
  PImage si = loadImage("fusion10_ste.jpg");
  int x13 = 455;
  int y13 = 115;
  int w13 = n.width;
  int h13 = n.height;
  button12 = new ImageButtons(x13, y13, w13, h13, mi, ni, si);
  
}

void draw()
{
  button.update();
  button.display();
  button1.update();
  button1.display();
  button2.update();
  button2.display();
  button3.update();
  button3.display();
  button4.update();
  button4.display();
  button5.update();
  button5.display();
  button6.update();
  button6.display();
  button7.update();
  button7.display();
  button8.update();
  button8.display();
  button9.update();
  button9.display();
  button10.update();
  button10.display();
  button11.update();
  button11.display();
  button12.update();
  button12.display();
 
}

class button
{
  int x, y;
  int w, h;
  int x2, y2;
  int w2, h2;
  int x3, y3;
  int w3, h3;
  int x4, y4;
  int w4, h4;
  int x5, y5;
  int w5, h5;
  int x6, y6;
  int w6, h6;
  int x7, y7;
  int w7, h7;
  int x8, y8;
  int w8, h8;
  int x9, y9;
  int w9, h9;
  int x10, y10;
  int w10, h10;
  int x11, y11;
  int w11, h11;
  int x12, y12;
  int w12, h12;
  int x13, y13;
  int w13, h13;
  color basecolor, highlightcolor;
  color currentcolor;
  boolean over = false;
  boolean pressed = false;  
 
  void pressed() {
    if(over && mousePressed) {
      pressed = true;

 
    } else {
      pressed = false;
    }   
  }
 
  boolean overRect(int x, int y, int width, int height) {
  if (mouseX >= x && mouseX <= x+width &&
      mouseY >= y && mouseY <= y+height) {
    return true;
  } else {
    return false;
  }
}
}



class ImageButtons extends button
{
  PImage base;
  PImage roll;
  PImage down;
  PImage currentimage;

  ImageButtons(int ix, int iy, int iw, int ih, PImage ibase, PImage iroll, PImage idown)
  {
    x = ix;
    y = iy;
    w = iw;
    h = ih;
    base = ibase;
    roll = iroll;
    down = idown;
    currentimage = base;
  }
 
  void update()
  {
    over();
    pressed();
    if(pressed) {
      currentimage = down;
 // play the file
  in.play();
 
    } else if (over){
      currentimage = roll;
    } else {
      currentimage = base;
    }
  }
 
  void over()
  {
    if( overRect(x, y, w, h) ) {
      over = true;
    } else {
      over = false;
    }
  }
 
  void display()
  {
    image(currentimage, x, y);
  }
}


void stop()
{
  // always close audio I/O classes
  in.close();

  // always stop your Minim object
  minim.stop();
 
 
  super.stop();
}