Buzzer Piano

1// defines buttonPins
2const int buttonPin2 = 2;
3const int buttonPin3  = 3;
4const int buttonPin4 = 4;
5const int buttonPin5 = 5;
6const int buttonPin6  = 6;
7const int buttonPin7 = 7;
8const int buttonPin8 = 8;
9
10const int  buzzer =  13;      // This is the pin connected to the buzzer
11
12// defines  the states of the buttons
13int buttonState2 = 0;
14int buttonState3 = 0;
15int  buttonState4 = 0;
16int buttonState5 = 0;
17int buttonState6 = 0;
18int buttonState7  = 0;
19int buttonState8 = 0;
20
21void setup() {
22  // Set buzzer-pin as output:
23  pinMode(buzzer, OUTPUT);
24  // Set button-pins as input:
25  pinMode(buttonPin2,  INPUT);
26  pinMode(buttonPin3, INPUT);
27  pinMode(buttonPin4, INPUT);
28  pinMode(buttonPin5,  INPUT);
29  pinMode(buttonPin6, INPUT);
30  pinMode(buttonPin7, INPUT);
31  pinMode(buttonPin8,  INPUT);
32
33}
34
35void loop() {
36  // reads button value:
37  buttonState2  = digitalRead(buttonPin2);
38  buttonState3 = digitalRead(buttonPin3);
39  buttonState4  = digitalRead(buttonPin4);
40  buttonState5 = digitalRead(buttonPin5);
41  buttonState6  = digitalRead(buttonPin6);
42  buttonState7 = digitalRead(buttonPin7);
43  buttonState8  = digitalRead(buttonPin8);
44
45  // Plays a specific frequency depending on which  button are pressed
46  if (buttonState2 == HIGH) {
47    tone(buzzer, 440.000);  // sends a frequency of 440Hz
48  }
49  else if (buttonState3 == HIGH) {
50    tone(buzzer, 391.995);
51  }
52  else if (buttonState4 == HIGH) {
53    tone(buzzer,  349.228);
54  }
55  else if (buttonState5 == HIGH) {
56    tone(buzzer, 329.628);
57  }
58  else if (buttonState6 == HIGH) {
59    tone(buzzer, 293.665);
60  }
61  else if (buttonState7 == HIGH) {
62    tone(buzzer, 261.626);
63  }
64  else  if (buttonState8 == HIGH) {
65    
66    // Plays a series of tones when the last  button is pressed
67
68    tone(buzzer, 329.628);
69    noTone(buzzer);
70    delay(100);
71    tone(buzzer, 329.628);
72    delay(100);
73    tone(buzzer, 329.628);
74    delay(200);
75    tone(buzzer, 261.626);
76    delay(200);
77    noTone(buzzer);
78    delay(2000);
79    tone(buzzer, 329.628);
80    delay(200);
81    tone(buzzer,  97.9989);
82    delay(100);
83  } 
84  else {
85    noTone(buzzer); // stops  sending frequencies to the buzzer
86  }
87  
88}
89