Rhythm & Eric : Melodic Piano – Introduction to Interactive Media

Description

Rhythm and Eric are to make a musical instrument using at least one digital sensor(switch), and at least one analog sensor (photoresistor, potentiometer, or distance measuring sensor)

Idea

The piano is usually used to play two parts simultaneously. One musician plays all the chords and melody. Chords and melodies both work together to create rhythm and harmony. A chord is when three or more notes are played together at the same time whilst melody is when single notes are played individually in a pattern or sequence.

Then comes the Eureka moment! We can have the melody which is 8 switches holding the single notes (do re me fa so la ti do) and a chord which is a photoresistor that plays a melody using three or more notes.

Process

So the setup was done as described above, we had 8 switches connected in a row, a buzzer for sound, and a photoresistor. Each note above was connected to one switch. Data from the photoresistor was mapped to play a chord.

Final Work

Challenges

Our initial plan was to use 8 photoresistors and a switch but couldn’t figure how to connect the 8 photoresistors to Arduino. We experimented with the distance sensor as well but were getting a weird noise from the buzzer, we rechecked the connection and code but still couldn’t get it to work. We also had in mind to include drums but couldn’t get the buzzer to produce drum notes.

Code

-Main

#include "pitches.h"
int knobPin = A0;

int melody[] = {NOTE_C4, NOTE_D4, NOTE_E4, NOTE_F4, NOTE_G4, NOTE_A4, NOTE_B4, NOTE_C5, NOTE_D5, NOTE_E5};
int noteDurations[] = {4, 8, 8, 4, 4, 4, 8, 4, 8, 4};

int duration = 100

// notes and their respective buttons
const int Dobbutton = 2;
const int Rebutton = 3;
const int Mibutton = 4;
const int Fabutton = 5;
const int Solbutton = 6;
const int Labutton = 7;
const int Tibutton = 8;
const int Dotbutton = 9;

// initial status of buttons
int DobButtonStatus = 0;
int ReButtonStatus = 0;
int MiButtonStatus = 0;
int FaButtonStatus = 0;
int SolButtonStatus = 0;
int LaButtonStatus = 0;
int TiButtonStatus = 0;
int DotButtonStatus = 0;


void setup()

{

  Serial.begin(9600);
  pinMode(knobPin, INPUT);


  pinMode(Dobbutton, INPUT);
  pinMode(Rebutton, INPUT);
  pinMode(Mibutton , INPUT);
  pinMode(Fabutton, INPUT);
  pinMode(Solbutton, INPUT);
  pinMode(Labutton, INPUT);
  pinMode(Tibutton , INPUT);
  pinMode(Dotbutton, INPUT);
}

void loop() {
  int ldrStatus = analogRead(knobPin);
  int mappedValue = map(ldrStatus, 0, 1023, 0, 255);
//  Serial.println(mappedValue);


  // check for photoresistor value and play chord
  
  if (mappedValue > 200 ) {
    for (int i = 0; i < 10; i++) {
      int noteDuration = 1000 / noteDurations[i];
      tone(10, melody[i], noteDuration);
      int pauseBetweenNotes = noteDuration * 1.30;
      delay(pauseBetweenNotes);
      noTone(10);

    }

  }

  
  //read state of buttons
  DobButtonStatus = digitalRead(Dobbutton);
  ReButtonStatus = digitalRead(Rebutton);
  buttonMistatus = digitalRead(Mibutton);
  FaButtonStatus = digitalRead(Fabutton);
  SolButtonStatus = digitalRead(Solbutton);
  LaButtonStatus = digitalRead(Labutton);
  TiButtonStatus = digitalRead(Tibutton);
  DotButtonStatus = digitalRead(Dotbutton);
  
  
  if (DobButtonStatus == HIGH) {
    tone(10, dot, duration); 
  }
  if (ReButtonStatus == HIGH) {
    tone(10, re, duration);
  }
  if (buttonMistatus == HIGH) {
    tone(10, mi, duration);
  }
  if (FaButtonStatus == HIGH) {
    tone(10, fa, duration);
  }
  if (SolButtonStatus == HIGH) {
    tone(10, sol, duration);
  }
  if (LaButtonStatus == HIGH) {
    tone(10, la, duration);
  }
  if (TiButtonStatus == HIGH) {
    tone(10, si, duration);
  }
  if (DotButtonStatus == HIGH) {
    tone(10, dot, duration);
  }


}

– Pitches.h

#define dot  264 //first do
#define re   297
#define mi   330
#define fa   352
#define sol  396
#define la   440
#define si   495
#define dot  528// last do



#define NOTE_B0  31
#define NOTE_C1  33
#define NOTE_CS1 35
#define NOTE_D1  37
#define NOTE_DS1 39
#define NOTE_E1  41
#define NOTE_F1  44
#define NOTE_FS1 46
#define NOTE_G1  49
#define NOTE_GS1 52
#define NOTE_A1  55
#define NOTE_AS1 58
#define NOTE_B1  62
#define NOTE_C2  65
#define NOTE_CS2 69
#define NOTE_D2  73
#define NOTE_DS2 78
#define NOTE_E2  80
#define NOTE_F2  87
#define NOTE_FS2 93
#define NOTE_G2  98
#define NOTE_GS2 104
#define NOTE_A2  110
#define NOTE_AS2 117
#define NOTE_B2  123
#define NOTE_C3  131
#define NOTE_CS3 139
#define NOTE_D3  147
#define NOTE_DS3 156
#define NOTE_E3  165
#define NOTE_F3  175
#define NOTE_FS3 185
#define NOTE_G3  196
#define NOTE_GS3 208
#define NOTE_A3  220
#define NOTE_AS3 233
#define NOTE_B3  247
#define NOTE_C4  262
#define NOTE_CS4 277
#define NOTE_D4  294
#define NOTE_DS4 311
#define NOTE_E4  330
#define NOTE_F4  349
#define NOTE_FS4 370
#define NOTE_G4  392
#define NOTE_GS4 415
#define NOTE_A4  440
#define NOTE_AS4 466
#define NOTE_B4  494
#define NOTE_C5  523
#define NOTE_CS5 554
#define NOTE_D5  587
#define NOTE_DS5 622
#define NOTE_E5  659
#define NOTE_F5  698
#define NOTE_FS5 740
#define NOTE_G5  784
#define NOTE_GS5 831
#define NOTE_A5  880
#define NOTE_AS5 932
#define NOTE_B5  988
#define NOTE_C6  1047
#define NOTE_CS6 1109
#define NOTE_D6  1175
#define NOTE_DS6 1245
#define NOTE_E6  1319
#define NOTE_F6  1397
#define NOTE_FS6 1480
#define NOTE_G6  1568
#define NOTE_GS6 1661
#define NOTE_A6  1760
#define NOTE_AS6 1865
#define NOTE_B6  1976
#define NOTE_C7  2093
#define NOTE_CS7 2217
#define NOTE_D7  2349
#define NOTE_DS7 2489
#define NOTE_E7  2637
#define NOTE_F7  2794
#define NOTE_FS7 2960
#define NOTE_G7  3136
#define NOTE_GS7 3322
#define NOTE_A7  3520
#define NOTE_AS7 3729
#define NOTE_B7  3951
#define NOTE_C8  4186
#define NOTE_CS8 4435