Notes

const int SENSOR_PIN = 0; // Analog input pin

const int buzzerPin = 9;

const int songLength = 18;

const int buttonPin1 = 1;
const int buttonPin2 = 2;
int buttonState1 = 0;
int buttonState2 = 0;

char notes[] = "cdfda ag cdfdg gf "; // a space represents a rest

int beats[] = {1,1,1,1,1,1,4,4,2,1,1,1,1,1,1,4,4,2};

int beats2[] = {2,3,4,1,2,3,4,1,1,1,3,4,1,1,3,4,1,1};

int tempo = 113;

void setup()
{
pinMode(buzzerPin, OUTPUT);
pinMode(buttonPin1, INPUT);
pinMode(buttonPin2, INPUT);
Serial.begin(9600);
}


void loop()
{
int sensorValue;

sensorValue = analogRead(SENSOR_PIN);

sensorValue = map(sensorValue, 0, 1023, 100,500);
sensorValue = constrain(sensorValue, 100,500);

int tempo = sensorValue;

Serial.println(sensorValue);

buttonState1 = digitalRead(buttonPin1);
buttonState2 = digitalRead(buttonPin2);

if (buttonState1 == HIGH){//***********************song1********************************

int i, duration;
for (i = 0; i < songLength; i++) // step through the song arrays
{
duration = beats[i] * tempo; // length of note/rest in ms

if (notes[i] == ' ') // is this a rest?
{
delay(duration); // then pause for a moment
}
else // otherwise, play the note
{
tone(buzzerPin, frequency(notes[i]), duration);
delay(duration); // wait for tone to finish
}
delay(tempo/10); // brief pause between notes
}

}//***********************song1********************************

if (buttonState2 == HIGH){//***********************song2********************************

int i, duration;
for (i = 0; i < songLength; i++) // step through the song arrays
{
duration = beats2[i] * tempo; // length of note/rest in ms

if (notes[i] == ' ') // is this a rest?
{
delay(duration); // then pause for a moment
}
else // otherwise, play the note
{
tone(buzzerPin, frequency2(notes[i]), duration);
delay(duration); // wait for tone to finish
}
delay(tempo/10); // brief pause between notes
}
}//***********************song2********************************

}



//---------------------------------------------------------------

int frequency(char note)
{

int i;
const int numNotes = 8;

char names[] = { 'a', 'a', 'b', 'c', 'c', 'c', 'd', 'a' };
int frequencies[] = {262, 294, 330, 349, 392, 440, 494, 523};

for (i = 0; i < numNotes; i++) // Step through the notes
{
if (names[i] == note) // Is this the one?
{
return(frequencies[i]); // Yes! Return the frequency
}
}
return(0);

}

int frequency2(char note)
{

int i;
const int numNotes = 8;

char names[] = { 'c', 'd', 'e', 'f', 'g', 'a', 'b', 'C' };
int frequencies[] = {262, 294, 330, 349, 392, 440, 494, 523};

for (i = 0; i < numNotes; i++) // Step through the notes
{
if (names[i] == note) // Is this the one?
{
return(frequencies[i]); // Yes! Return the frequency
}
}
return(0);

}