Teensy 3.0 + Ada FRuit VS1053 Audio Breakout Board Problems

#include <SPI.h>
#include <Adafruit_VS1053.h>
#include <SD.h>

// define the pins used
//#define CLK 13       // SPI Clock, shared with SD card
//#define MISO 12      // Input data, from VS1053/SD card
//#define MOSI 11      // Output data, to VS1053/SD card
// Connect CLK, MISO and MOSI to hardware SPI pins. 

// These can be any pins:
#define RESET 9      // VS1053 reset pin (output)
#define CS 10        // VS1053 chip select pin (output)
#define DCS 8        // VS1053 Data/command select pin (output)
#define CARDCS 4     // Card chip select pin
// DREQ should be an Int pin, see http://arduino.cc/en/Reference/attachInterrupt
#define DREQ 7       // VS1053 Data request, ideally an Interrupt pin


Adafruit_VS1053_FilePlayer musicPlayer = Adafruit_VS1053_FilePlayer(RESET, CS, DCS, DREQ, CARDCS);

byte serialIn;
byte playbacknumber;

void setup() {
  Serial.begin(9600);

  musicPlayer.begin(); // initialise the music player
  SD.begin(CARDCS);    // initialise the SD card

  musicPlayer.setVolume(0,0);

  musicPlayer.useInterrupt(VS1053_FILEPLAYER_PIN_INT);  // DREQ int
}

void loop() {

  while (Serial.available() > 0) { // mail call
    serialIn = Serial.read();
    if (serialIn == '1') {
      playbacknumber = 1;
    }
    if (serialIn == '2') { 
      playbacknumber = 2;
    }
    if (serialIn == '3') {
      playbacknumber = 3;
    }    
  } // end while

  // options below allow input via serial (1, 2, 3)
  if (playbacknumber == 1) {
    //musicPlayer.startPlayingFile("track001.mp3");
    musicPlayer.playFullFile("track001.mp3");
    playbacknumber = 0;
  }
  if (playbacknumber == 2) {
    //musicPlayer.startPlayingFile("track002.mp3");
    musicPlayer.playFullFile("track002.mp3");
    playbacknumber = 0;
  }
  if (playbacknumber == 3) {
    // can't get this to work...in theory should only work when "startplayingfile" has been called
    musicPlayer.playingMusic = false;
    playbacknumber = 0;
  }

  // uncomment below to loop playback of a sound file
  
  //musicPlayer.playFullFile("track001.mp3");
  //delay(1000);
  

}

/*************************************************** 
  This is an example for the Adafruit VS1053 Codec Breakout

  Designed specifically to work with the Adafruit VS1053 Codec Breakout 
  ----> https://www.adafruit.com/products/1381

  Adafruit invests time and resources providing this open source code, 
  please support Adafruit and open-source hardware by purchasing 
  products from Adafruit!

  Written by Limor Fried/Ladyada for Adafruit Industries.  
  BSD license, all text above must be included in any redistribution
 ****************************************************/

// include SPI, MP3 and SD libraries
#include <SPI.h>
#include <Adafruit_VS1053.h>
#include <SD.h>

#define CORE_TEENSY 1
//SPI.setClockDivider(SPI_CLOCK_DIV2);

#define CLK 13 // SPI Clock, shared with SD card
#define MISO 12 // Input data, from VS1053/SD card
#define MOSI 11 // Output data, to VS1053/SD card
#define RESET 23 // VS1053 reset pin (output)
#define CS 20 // VS1053 chip select pin (output)
#define DCS 22 // VS1053 Data/command select pin (output)
#define DREQ 5 // VS1053 Data request pin (into Arduino)
#define CARDCS 21 // Card chip select pin
Adafruit_VS1053_FilePlayer musicPlayer = Adafruit_VS1053_FilePlayer(RESET, CS, DCS, DREQ, CARDCS);

void setup() {
  Serial.begin(9600);
 // pinMode(RESET, OUTPUT);
 // digitalWrite(RESET, HIGH);
  Serial.println("Adafruit VS1053 Simple Test");

  if (! musicPlayer.begin()) { // initialise the music player
     Serial.println(F("Couldn't find VS1053, do you have the right pins defined?"));
     while (1);
  }
  Serial.println(F("VS1053 found"));
  
  SD.begin(CARDCS);    // initialise the SD card
  
  // Set volume for left, right channels. lower numbers == louder volume!
  musicPlayer.setVolume(20,20);

  // Timer interrupts are not suggested, better to use DREQ interrupt!
  //musicPlayer.useInterrupt(VS1053_FILEPLAYER_TIMER0_INT); // timer int

  // If DREQ is on an interrupt pin (on uno, #2 or #3) we can do background
  // audio playing
  musicPlayer.useInterrupt(VS1053_FILEPLAYER_PIN_INT);  // DREQ int
  
  // Play one file, don't return until complete
  Serial.println(F("Playing track 001"));
  musicPlayer.playFullFile("track001.mp3");
  // Play another file in the background, REQUIRES interrupts!
  Serial.println(F("Playing track 002"));
  musicPlayer.startPlayingFile("track002.mp3");
}

void loop() {
  // File is playing in the background
  if (musicPlayer.stopped()) {
    Serial.println("Done playing music");
    while (1);
  }
  if (Serial.available()) {
    char c = Serial.read();
    
    // if we get an 's' on the serial console, stop!
    if (c == 's') {
      musicPlayer.stopPlaying();
    }
    
    // if we get an 'p' on the serial console, pause/unpause!
    if (c == 'p') {
      if (! musicPlayer.paused()) {
        Serial.println("Paused");
        musicPlayer.pausePlaying(true);
      } else { 
        Serial.println("Resumed");
        musicPlayer.pausePlaying(false);
      }
    }
  }

  delay(100);
}