Adding background music that autostarts with application

I am trying to add background music that auto-starts when i run the processing sketch

i followed a simple instruction online and i added codes at line 6 , 26, 27,40,46 ,48, and from 75 to 82

but i keep getting the error "duplicate field name.player" at line 26 .

that said, can i use any mp3 file by specifying the file or does it have to be at a specific bitrate ?

here's my code ,what am i doing wrong

import processing.serial.*;
import processing.opengl.*;
import ddf.minim.*;
Serial serial;
int serialPort = 1; // << Set this to be the serial port of your Arduino - ie if you have 3 ports : COM1, COM2, COM3
// and your Arduino is on COM2 you should set this to '1' - since the array is 0 based
int sen = 3; // sensors
int div = 3; // board sub divisions
Normalize n[] = new Normalize[sen];
MomentumAverage cama[] = new MomentumAverage[sen];
MomentumAverage axyz[] = new MomentumAverage[sen];
float[] nxyz = new float[sen];
int[] ixyz = new int[sen];
float w = 256; // board size
boolean[] flip = {
false, true, false};
AudioPlayer player;
Minim minim;
int player = 0;
boolean moves[][][][];
PFont font;
PImage b;
void setup() {
size(1026, 770, P3D);
frameRate(25);
minim = new Minim(this);
// load a file, give the AudioPlayer buffers that are 1024 samples long
// player = minim.loadFile("groove.mp3");
// load a file, give the AudioPlayer buffers that are 2048 samples long
player = minim.loadFile("groove.mp3", 2048);
// play the file
player.play();
b = loadImage("data/3.jpg");
font = loadFont("TrebuchetMS-Italic-20.vlw");
textFont(font);
textMode(SCREEN);
println(Serial.list());
serial = new Serial(this, Serial.list()[serialPort], 115200);
for(int i = 0; i < sen; i++) {
n[i] = new Normalize();
cama[i] = new MomentumAverage(.01);
axyz[i] = new MomentumAverage(.15);
}
reset();
}
void draw() {
background(b);
updateSerial();
drawBoard();
}
void stop()
{
player.close();
minim.stop();
super.stop();
}

...........continues

any form of help would be much appreciated