Play a binary string as music in javascript

play_binary_music.js

// Define the audio context
var audioContext = new AudioContext();

// Define the notes and their corresponding frequencies
var notes = {
  'C': 16.35,
  'C#': 17.32,
  'D': 18.35,
  'D#': 19.45,
  'E': 20.60,
  'F': 21.83,
  'F#': 23.12,
  'G': 24.50,
  'G#': 25.96,
  'A': 27.50,
  'A#': 29.14,
  'B': 30.87
};

// Define the playNote() function
function playNote(note, duration) {
  // Check if the duration is a finite number
  if (!isFinite(duration)) {
    // If the duration is not finite, use a default value instead
    duration = 0.5;
  }

  // Create an oscillator to generate the musical note
  var oscillator = audioContext.createOscillator();
  oscillator.type = 'sine';
  oscillator.frequency.value = 440 * Math.pow(2, notes[note] / 12);

  // Create a gain node to control the volume of the note
  var gainNode = audioContext.createGain();
  gainNode.gain.value = 0.25;

  // Connect the oscillator and gain node to the audio context destination
  oscillator.connect(gainNode);
  gainNode.connect(audioContext.destination);

  // Start the oscillator and set its duration
  oscillator.start();
  oscillator.stop(audioContext.currentTime + duration);
}


// Define the playBinarySong() function
function playBinarySong(binaryString) {
  // Convert the binary string into an array of ones and zeros
  var binaryArray = binaryString.split('');

  // Define the notes and durations for the song
  var notes = ['C', 'D', 'E', 'F', 'G', 'A', 'B'];
  var durations = [0.25, 0.5, 0.75, 1];

  // Loop through the binary array and play each note
  for (var i = 0; i < binaryArray.length; i++) {
    var note = notes[i % notes.length]; // Select the next note in the sequence
    var duration = durations[binaryArray[i]]; // Select the duration based on the binary value

    // Play the note with the selected duration
    playNote(note, duration);
  }
}

// Define a binary string that represents a song
var binaryString = '01001011';

// Play the binary song
playBinarySong(binaryString);
playBinarySong('01001011100101010101011101011011');
var binaryString =
  '10010010010010010010010010010010 01001011100101010101011101011011 10110101011010100101010110101010 10101010010101011010101001010101 10101010101010101010101010101010 10010010010010010010010010010010 10010010010010010010010010010010 01001011100101010101011101011011';

// Play the binary song
playBinarySong(binaryString);