/*
* LilyPad tutorial: sound
*
* Uses a LilyPad speaker module to produce simple musical notes
* For a chart of the frequencies of different notes see:
* http://www.phy.mtu.edu/~suits/notefreqs.html
*/
int ledPin = 13;	// LED is connected to digital pin 13
int speakerPin = 9;	// speaker connected to digital pin 9
void setup()
{
pinMode(ledPin, OUTPUT);	// sets the ledPin to be an output
pinMode(speakerPin, OUTPUT);	// sets the speakerPin to be an output
}
void loop()	// run over and over again
{
scale();	// call the scale() function
delay(1000);	// delay for 1 second
}
void beep (unsigned char speakerPin, int frequencyInHertz, long timeInMilliseconds)     // the sound producing function
{
int x;
long delayAmount = (long)(1000000/frequencyInHertz);
long loopTime = (long)((timeInMilliseconds*1000)/(delayAmount*2));
for (x=0;x<loopTime;x++)
{
digitalWrite(speakerPin,HIGH);
delayMicroseconds(delayAmount);
digitalWrite(speakerPin,LOW);
delayMicroseconds(delayAmount);
}
}
void scale ()
{
digitalWrite(ledPin,HIGH);	//turn on the LED
beep(speakerPin,2093,500);	//C: play the note C (C7 from the chart linked to above) for 500ms
beep(speakerPin,2349,500);	//D
beep(speakerPin,2637,500);	//E
beep(speakerPin,2793,500);	//F
beep(speakerPin,3136,500);	//G
beep(speakerPin,3520,500);	//A
beep(speakerPin,3951,500);	//B
beep(speakerPin,4186,500);	//C
digitalWrite(ledPin,LOW);	//turn off the LED
}