Arduino/build/shared/examples/02.Digital/toneMultiple/toneMultiple.ino

/*
  Multiple tone player

 Plays multiple tones on multiple pins in sequence

 circuit:
 * 3 8-ohm speaker on digital pins 6, 7, and 8

 created 8 March 2010
 by Tom Igoe
 based on a snippet from Greg Borenstein

This example code is in the public domain.

 http://www.arduino.cc/en/Tutorial/Tone4

 */

void setup() {

}

void loop() {
  // turn off tone function for pin 8:
  noTone(8);
  // play a note on pin 6 for 200 ms:
  tone(6, 440, 200);
  delay(200);

  // turn off tone function for pin 6:
  noTone(6);
  // play a note on pin 7 for 500 ms:
  tone(7, 494, 500);
  delay(500);

  // turn off tone function for pin 7:
  noTone(7);
  // play a note on pin 8 for 500 ms:
  tone(8, 523, 300);
  delay(300);
}