Hi,
I'm trying to make a player that changes songs with buttons, but I've been having problems with the way I make the songs actually change.... The first song plays ok, but when I try to play the second an error always comes up, or the application just fails. I've changed the code like a million times, but anything seems to work.
This is my code, I hope someone can help me soon.

Thnks.


//importa las librerias
import ddf.minim.signals.*;
import ddf.minim.*;
import ddf.minim.analysis.*;
import ddf.minim.effects.*;

//lo del sonido
Minim minim;
AudioPlayer primera;

AudioPlayer segunda;






//estos float son los que sirven para cada segmento, son 20 segmentos y sus ubicaciones
//en x y y.
float[] x = new float[20];
float[] y = new float[20];
float segLength = 9;

void setup() {
 size(800,600,P2D);
 minim = new Minim(this);

 primera = minim.loadFile("I'm Yours.mp3", 512);

 segunda = minim.loadFile("Sentimento Pentimento.mp3",512);

 loop();






 strokeJoin(ROUND);
 smooth();
 strokeWeight(3);
 stroke(0,100);
}

void draw() {
 background(255);

 //botones de las canciones
 fill(255,230,20);
 ellipse(200,50,50,50);
 fill(253,141,21);
 ellipse(300,50,50,50);
 fill(238,68,150);
 ellipse(400, 50, 50, 50);
 fill(255,0,0);
 ellipse(500,50,50,50);
 fill(150,34,150);
 ellipse(600,50,50,50);

 //culebra
 dragSegment(0, mouseX, mouseY);

 for(int i=0; i<x.length-1; i++) {
   dragSegment(i+1, x[i], y[i]);
 }

 for(int e = 0; e < primera.bufferSize() - 1; e++)
 {
   stroke(139,2,24);
   strokeWeight(2);
   //line(x1,y1,x2,y2)
   line(e, 200 +primera.left.get(e)*100, e*2, 200 + primera.left.get(e+1)*50);
   line(e, 400 + primera.right.get(e)*50, e*2, 400 + primera.right.get(e+1)*100);


 }



}



//lo de los segmentos de la culebra
void dragSegment(int i, float xin, float yin) {

 strokeJoin(ROUND);
 smooth();
 strokeWeight(3);
 stroke(0,100);

 float dx = xin - x[i];
 float dy = yin - y[i];
 float angle = atan2(dy, dx);  
 x[i] = xin - cos(angle) * segLength;
 y[i] = yin - sin(angle) * segLength;
 segment(x[i], y[i], angle);
}

//void mouseReleased ();

void segment(float x, float y, float a) {
 pushMatrix();
 translate(x, y);
 rotate(a);
 line(0, 0, segLength, 0);
 popMatrix();
}

void mouseReleased() {
 if((mouseX>175) && (mouseX<225) && (mouseY>25) && (mouseY<75)) {

   primera.play();

 }
 else {
   primera.play()
   stop();
   
 }

//  if((mouseX>275) && (mouseX<325) && (mouseY>25) && (mouseY<75)) {

 //  segunda.play();

 
// }else {
//   segunda.play();
//   stop();
// }





}

void stop()
{


primera.close();
//segunda.close();
 minim.stop();


 super.stop();
}