Play the French Can Can Using an Arduino and Buzzer

Step 9 Play the Can Can

It's time to make some music! Using a grand piano (or Garage Band in my case), listen to the different notes you want to create. Play the song by ear, or look it up on sheet music. For each note you wish to create, count from the first note in the array, F, to figure out which note integer in the array matches the note being played on the piano.

NoteInt Example: 

G = ??: We'll figure this out.
F = 0
Add an octave (12) to make the pitch more pleasing on this buzzer = 12
G is 2 keys higher than F (black and white key) on the keyboard, so add 2 = 14
G = 14

For play length in this example:

a sixteenth note = 250 miliseconds
an eighth note = 500 miliseconds
a quarter note = 1000 miliseconds
a half note = 2000 miliseconds
a whole note = 4000 miliseconds

Also, the default 'breath' length in the playNote() function has been changed to 20, to give a slight pause between each note to give a 'tee-tee-tee-tee' effect when playing. Here are the results:

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// Buzzer example function for the CEM-1203 buzzer (Sparkfun's part #COM-07950).
// by Rob Faludi
// http://www.faludi.com

// Additions by Christopher Stevens
// http://www.christopherstevens.cc

//referenced from http://www.phy.mtu.edu/~suits/notefreqs.html
//starting with F noteFreqArr[1]
int noteFreqArr[] = {
49.4, 52.3, 55.4, 58.7, 62.2, 65.9, 69.9, 74, 78.4, 83.1, 88, 93.2,
98.8, 105, 111, 117, 124, 132, 140, 148, 157, 166, 176, 186,
198, 209, 222, 235, 249, 264, 279, 296, 314, 332, 352, 373,
395, 419, 444, 470, 498, 527, 559, 592, 627, 665, 704, 746,
790, 837, 887, 940, 996, 1050, 1110, 1180, 1250, 1320, 1400, 1490,
1580, 1670, 1770, 1870, 1990, 2100};

void setup() {
  pinMode(4, OUTPUT); // set a pin for buzzer output
}

void playNote(int noteInt, long length, long breath = 20) {
  length = length - breath;
  buzz(4, noteFreqArr[noteInt], length);
  if(breath > 0) { //take a short pause or 'breath' if specified
    delay(breath);
  }
}

void loop() {
  //main course
  playNote(24,500);
 
  playNote(17,1000);
  playNote(19,250);
  playNote(22,250);
  playNote(21,250);
  playNote(19,250);
  playNote(24,500);
  playNote(24,500);
  playNote(24,250);
  playNote(26,250);
  playNote(21,250);
  playNote(22,250);
  playNote(19,500);
  playNote(19,500);
  playNote(19,250);
  playNote(22,250);
  playNote(21,250);
  playNote(19,250);
  playNote(17,250);
  playNote(29,250);
  playNote(28,250);
  playNote(26,250);
  playNote(24,250);
  playNote(22,250);
  playNote(21,250);
  playNote(19,250);
 
  playNote(17,1000);
  playNote(19,250);
  playNote(22,250);
  playNote(21,250);
  playNote(19,250);
  playNote(24,500);
  playNote(24,500);
  playNote(24,250);
  playNote(26,250);
  playNote(21,250);
  playNote(22,250);
  playNote(19,500);
  playNote(19,500);
  playNote(19,250);
  playNote(22,250);
  playNote(21,250);
  playNote(19,250);
  playNote(17,250);
  playNote(24,250);
  playNote(19,250);
  playNote(21,250);
  playNote(17,250);
  delay(250);
}

void buzz(int targetPin, long frequency, long length) {
  long delayValue = 1000000/frequency/2; // calculate the delay value between transitions
  //// 1 second's worth of microseconds, divided by the frequency, then split in half since
  //// there are two phases to each cycle
  long numCycles = frequency * length/ 1000; // calculate the number of cycles for proper timing
  //// multiply frequency, which is really cycles per second, by the number of seconds to
  //// get the total number of cycles to produce
  for (long i=0; i < numCycles; i++){ // for the calculated length of time...
    digitalWrite(targetPin,HIGH); // write the buzzer pin high to push out the diaphram
    delayMicroseconds(delayValue); // wait for the calculated delay value
    digitalWrite(targetPin,LOW); // write the buzzer pin low to pull back the diaphram
    delayMicroseconds(delayValue); // wait againf or the calculated delay value
  }
}

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The Arduino is now playing the Can Can, but it is still... blah blah. The next step gives the notes a bit more texture.

Comments

[emihackr97]

Men this is exactly what i was looking for, 5 stars!!!!

Great 'ible!!