diff --git a/toneAC2/toneAC2.cpp b/toneAC2/toneAC2.cpp
index 7de7274..39c5732 100644
--- a/toneAC2/toneAC2.cpp
+++ b/toneAC2/toneAC2.cpp
@@ -8,12 +8,12 @@
 #include "toneAC2.h"
 
 unsigned long _tAC2_time; // Used to track end note with timer when playing note in the background.
-volatile uint8_t *_pinMode1, *_pinMode2;     // Pin modes.
-uint8_t _pinMask1 = 0, _pinMask2 = 0;        // Bitmask for pins.
-volatile uint8_t *_pinOutput1, *_pinOutput2; // Output port registers for each pin.
+volatile uint8_t *_pinMode1;     // Pin modes.
+uint8_t _pinMask1 = 0;        // Bitmask for pins.
+volatile uint8_t *_pinOutput1; // Output port registers for each pin.
 int _tAC2_prescale[] = { 2, 16, 64, 128, 256, 512, 2048 }; // Prescaler.
 
-void toneAC2(uint8_t pin1, uint8_t pin2, unsigned int frequency, unsigned long length, uint8_t background) {
+void toneAC2(uint8_t pin1, unsigned int frequency, unsigned long length, uint8_t background) {
   long top;
   uint8_t prescaler;
 
@@ -27,13 +27,9 @@ void toneAC2(uint8_t pin1, uint8_t pin2, unsigned int frequency, unsigned long l
 
   if (_pinMask1 == 0) { // This gets the port registers and bitmaps for the two pins and sets the pins to output mode.
     _pinMask1   = digitalPinToBitMask(pin1);                            // Get the port register bitmask for pin 1.
-    _pinMask2   = digitalPinToBitMask(pin2);                            // Get the port register bitmask for pin 2.
     _pinOutput1 = portOutputRegister(digitalPinToPort(pin1));           // Get the output port register for pin 1.
-    _pinOutput2 = portOutputRegister(digitalPinToPort(pin2));           // Get the output port register for pin 2.
     _pinMode1   = (uint8_t *) portModeRegister(digitalPinToPort(pin1)); // Get the port mode register for pin 1.
-    _pinMode2   = (uint8_t *) portModeRegister(digitalPinToPort(pin2)); // Get the port mode register for pin 2.
     *_pinMode1 |= _pinMask1; // Set pin 1 to Output mode.
-    *_pinMode2 |= _pinMask2; // Set pin 2 to Output mode.
   }
 
   OCR2A   = top;                     // Set the top.
@@ -41,8 +37,6 @@ void toneAC2(uint8_t pin1, uint8_t pin2, unsigned int frequency, unsigned long l
   TCCR2B  = _BV(WGM22) | prescaler;  // Set Fast PWM and prescaler.
   TCCR2A  = _BV(WGM20) | _BV(WGM21); // Fast PWM and normal port operation, OC2A/OC2B disconnected.
   TIMSK2 &= ~_BV(OCIE2A);            // Stop timer 2 interrupt while we set the pin states.
-  if (*_pinOutput1 & _pinMask1) *_pinOutput2 &= ~_pinMask2; // Be sure pins are reversed.
-  else *_pinOutput2 |= _pinMask2;    // Other half of making sure pins are reversed.
   TIMSK2 |= _BV(OCIE2A);             // Activate the timer interrupt.
   
   if (length > 0 && !background) { delay(length); noToneAC2(); } // Just a simple delay, doesn't return control till finished.
@@ -53,12 +47,10 @@ void noToneAC2() {
   TCCR2B  = _BV(CS22);        // Default clock prescaler of 64.
   TCCR2A  = _BV(WGM20);       // Set to defaults so PWM can work like normal (PWM, phase corrected, 8bit).
   *_pinMode1 &= ~_pinMask1;   // Set pin 1 to INPUT.
-  *_pinMode2 &= ~_pinMask2;   // Set pin 2 to INPUT.
   _pinMask1 = 0; // Flag so we know note is no longer playing.
 }
 
 ISR(TIMER2_COMPA_vect) { // Timer interrupt vector.
   if (millis() > _tAC2_time) noToneAC2(); // Check to see if it's time for the note to end.
   *_pinOutput1 ^= _pinMask1; // Toggle the pin 1 state.
-  *_pinOutput2 ^= _pinMask2; // Toggle the pin 2 state.
 }
\ No newline at end of file
diff --git a/toneAC2/toneAC2.h b/toneAC2/toneAC2.h
index 1d244d6..f186d48 100644
--- a/toneAC2/toneAC2.h
+++ b/toneAC2/toneAC2.h
@@ -68,6 +68,6 @@
     #define TIMER2_COMPA_vect TIMER2_COMP_vect
   #endif
 
-  void toneAC2(uint8_t pin1, uint8_t pin2, unsigned int frequency = 0, unsigned long length = 0, uint8_t background = false);
+  void toneAC2(uint8_t pin1, unsigned int frequency = 0, unsigned long length = 0, uint8_t background = false);
   void noToneAC2();
 #endif
\ No newline at end of file