#include "pitches.h"
int button_C = 2;
int button_D = 3;
int button_E = 4;
int button_F = 5;
int button_G = 6;
int button_A = 7;
int button_B = 8;
int button_Cup = 9;
int speaker = 13;
int buttonstate_C = 0;
int buttonstate_D = 0;
int buttonstate_E = 0;
int buttonstate_F = 0;
int buttonstate_G = 0;
int buttonstate_A = 0;
int buttonstate_B = 0;
int buttonstate_Cup = 0;
//NOTES 'c' ,'d', 'e', 'f' , 'g', 'a', 'b', 'C'
int tones[] = { 262, 294, 330, 349, 392, 440, 494, 523 }; //freq
int Cur_tone = 0;
void setup()
{
 pinMode(button_C, INPUT);
 pinMode(button_D, INPUT);
 pinMode(button_E, INPUT);
 pinMode(button_F, INPUT);
 pinMode(button_G, INPUT);
 pinMode(button_A, INPUT);
 pinMode(button_B, INPUT);
 pinMode(button_Cup, INPUT);
 pinMode(speaker, OUTPUT);
}
void loop()
{
 buttonstate_C = digitalRead(button_C);
 buttonstate_D = digitalRead(button_D);
 buttonstate_E = digitalRead(button_E);
 buttonstate_F = digitalRead(button_F);
 buttonstate_G = digitalRead(button_G);
 buttonstate_A = digitalRead(button_A);
 buttonstate_B = digitalRead(button_B);
 buttonstate_Cup = digitalRead(button_Cup);
 if((buttonstate_C == HIGH) || (buttonstate_E == HIGH) ||
(buttonstate_G == HIGH) || (buttonstate_D == HIGH) ||
(buttonstate_F == HIGH) || (buttonstate_A == HIGH) ||
(buttonstate_B == HIGH) || (buttonstate_Cup == HIGH) )
 {
if (buttonstate_C == HIGH)
 {
 Cur_tone = tones[0];
 }
 
 if (buttonstate_E == HIGH)
 {
 Cur_tone = tones[1];
 }
 if (buttonstate_G == HIGH)
 {
 Cur_tone = tones[2];
 }
 if (buttonstate_D == HIGH)
 {
 Cur_tone = tones[3];
 }
 if (buttonstate_F == HIGH)
 {
 Cur_tone = tones[4];
 }
 if (buttonstate_A == HIGH)
 {
 Cur_tone = tones[5];
 }
 if (buttonstate_B == HIGH)
 {
 Cur_tone = tones[6];
 }
 if (buttonstate_Cup == HIGH)
 {
 Cur_tone = tones[7];
 }
 digitalWrite(speaker, HIGH);
 delayMicroseconds(Cur_tone);
 digitalWrite(speaker, LOW);
 delayMicroseconds(Cur_tone);
 }
 else //in case no button is pressed , close the piezo
 {
 digitalWrite(speaker, LOW);
 }
}