Arduino NFL Sound Bite Machine

//TMRpcm library is needed

#include "SD.h"
#define SD_ChipSelectPin 10
#include "TMRpcm.h"
#include "SPI.h"

TMRpcm tmrpcm;
const int buttonPin = 2;
const int ledPin =  4;
int ledState = LOW;
boolean buttonState = LOW;

int pressed=0;

void setup() {
  pinMode(ledPin, OUTPUT);
  pinMode(buttonPin, INPUT);
tmrpcm.speakerPin=9;
Serial.begin(9600);
if(!SD.begin(SD_ChipSelectPin))
{
  Serial.println("SD fail");
  return;
}
tmrpcm.setVolume(5);
}

void loop() {

  if(debounceButton(buttonState) == HIGH && buttonState == LOW)
  {
    pressed++;
    buttonState = HIGH;

    switch (pressed){
      case 1:
        tmrpcm.play("1.wav");
        break;
      case 2:
        tmrpcm.play("2.wav");
        break;
      case 3:
        tmrpcm.play("3.wav");
        break;
      case 4:
        tmrpcm.play("4.wav");
        break;
      case 5:
        tmrpcm.play("5.wav");
        break;
      case 6:
        tmrpcm.play("6.wav");
        break;
      case 7:
        tmrpcm.play("7.wav");
        break;
      case 8:
        tmrpcm.play("8.wav");
        break;
      case 9:
        tmrpcm.play("9.wav");
        break;
      case 10:
        tmrpcm.play("10.wav");
        break;
      case 11:
        tmrpcm.play("11.wav");
        break;
      case 12:
        tmrpcm.play("12.wav");
        break;
      case 13:
        tmrpcm.play("13.wav");
        break;
      default:
        pressed = 0;
     }
 //...............................
  }
  else if(debounceButton(buttonState) == LOW && buttonState == HIGH)
  {
       buttonState = LOW;

         }
  }

boolean debounceButton(boolean state)
{
  boolean stateNow = digitalRead(buttonPin);
  if(state!=stateNow)
  {
    delay(10);
    stateNow = digitalRead(buttonPin);
  }
  return stateNow;
}