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+// ---------------------------------------------------------------------------
+// Created by Tim Eckel - teckel@leethost.com
+// Copyright 2013 License: GNU GPL v3 http://www.gnu.org/licenses/gpl-3.0.html
+//
+// See "NewTone.h" for purpose, syntax, version history, links, and more.
+// ---------------------------------------------------------------------------
+
+#include "NewTone.h"
+
+unsigned long _nt_time;       // Time note should end.
+uint8_t _pinMask = 0;         // Pin bitmask.
+volatile uint8_t *_pinOutput; // Output port register
+
+void NewTone(uint8_t pin, unsigned long frequency, unsigned long length) {
+  uint8_t prescaler = _BV(CS10);                 // Try using prescaler 1 first.
+  unsigned long top = F_CPU / frequency / 4 - 1; // Calculate the top.
+  if (top > 65535) {                             // If not in the range for prescaler 1, use prescaler 256 (61 Hz and lower @ 16 MHz).
+    prescaler = _BV(CS12);                       // Set the 256 prescaler bit.
+    top = top / 256 - 1;                         // Calculate the top using prescaler 256.
+  }
+
+  if (length > 0) _nt_time = millis() + length; else _nt_time = 0xFFFFFFFF; // Set when the note should end, or play "forever".
+
+  if (_pinMask == 0) {
+    _pinMask = digitalPinToBitMask(pin);                    // Get the port register bitmask for the pin.
+    _pinOutput = portOutputRegister(digitalPinToPort(pin)); // Get the output port register for the pin.
+    uint8_t *_pinMode = (uint8_t *) portModeRegister(digitalPinToPort(pin)); // Get the port mode register for the pin.
+    *_pinMode |= _pinMask; // Set the pin to Output mode.
+  }
+
+  ICR1    = top;                     // Set the top.
+  if (TCNT1 > top) TCNT1 = top;      // Counter over the top, put within range.
+  TCCR1B  = _BV(WGM13)  | prescaler; // Set PWM, phase and frequency corrected (ICR1) and prescaler.
+  TCCR1A  = _BV(COM1B0);
+  TIMSK1 |= _BV(OCIE1A);             // Activate the timer interrupt.
+}
+
+void noNewTone(uint8_t pin) {
+  TIMSK1 &= ~_BV(OCIE1A);   // Remove the timer interrupt.
+  TCCR1B  = _BV(CS11);      // Default clock prescaler of 8.
+  TCCR1A  = _BV(WGM10);     // Set to defaults so PWM can work like normal (PWM, phase corrected, 8bit).
+  *_pinOutput &= ~_pinMask; // Set pin to LOW.
+  _pinMask = 0; // Flag so we know note is no longer playing.
+}
+
+ISR(TIMER1_COMPA_vect) { // Timer interrupt vector.
+  if (millis() >= _nt_time) noNewTone(); // Check to see if it's time for the note to end.
+  *_pinOutput ^= _pinMask; // Toggle the pin state.
+}
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+// ---------------------------------------------------------------------------
+// NewTone Library - v1.0 - 01/20/2013
+//
+// AUTHOR/LICENSE:
+// Created by Tim Eckel - teckel@leethost.com
+// Copyright 2013 License: GNU GPL v3 http://www.gnu.org/licenses/gpl-3.0.html
+//
+// LINKS:
+// Project home: http://code.google.com/p/arduino-new-tone/
+// Blog: http://arduino.cc/forum/index.php/XXX
+//
+// DISCLAIMER:
+// This software is furnished "as is", without technical support, and with no 
+// warranty, express or implied, as to its usefulness for any purpose.
+//
+// PURPOSE:
+// Almost 1,300 bytes smaller code size than the Tone library. Faster execution
+// time. Exclusive use of port registers for fastest and smallest code. Higher
+// quality sound output than tone library. Plug-in replacement for Tone. Uses
+// timer 1 which may free up conflicts with the tone library.
+//
+// SYNTAX:
+//   NewTone( pin, frequency [, length ] ) - Play a note on pin at frequency in Hz.
+//     Parameters:
+//       * pin        - Pin speaker is wired to (other wire to ground, be sure to add an inline 100 ohm resistor).
+//       * frequency  - Play the specified frequency indefinitely, turn off with noNewTone().
+//       * length     - [optional] Set the length to play in milliseconds. (default: 0 [forever], range: 0 to 2^32-1)
+//   noNewTone(pin) - Stop playing note (pin is optional, will always stop playing on pin that was last used).
+//
+// HISTORY:
+// 01/20/2013 v1.0 - Initial release.
+//
+// ---------------------------------------------------------------------------
+
+#ifndef NewTone_h
+  #define NewTone_h
+
+  #if defined(ARDUINO) && ARDUINO >= 100
+    #include <Arduino.h>
+  #else
+    #include <WProgram.h>
+  #endif
+
+  #if defined(__AVR_ATmega8__) || defined(__AVR_ATmega128__)
+    #define TIMSK1 TIMSK
+  #endif
+
+  void NewTone(uint8_t pin, unsigned long frequency, unsigned long length = 0);
+  void noNewTone(uint8_t pin = 0);
+#endif
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+###################################
+# Syntax Coloring Map For NewPing
+###################################
+
+###################################
+# Datatypes (KEYWORD1)
+###################################
+
+###################################
+# Methods and Functions (KEYWORD2)
+###################################
+
+NewTone	KEYWORD2
+noNewTone	KEYWORD2
+
+###################################
+# Constants (LITERAL1)
+###################################