wavepot song

wavepot.js

var pitches = {
  'C4':  262,
  'C#4': 278,
  'D4':  294,
  'D#4': 311,
  'E4':  330,
  'F4':  349,
  'F#4': 370,
  'G4':  392,
  'G#4': 415,
  'A4':  440,
  'A#4': 466,
  'B4':  494,
  'C5':  523
}

function dsp(t) {
  var beat = Math.floor(t * 4) % 8;
  var tone;
  switch(beat) {
    case 0:
      tone = pitches['C4'];
      break;
    case 1:
      tone = pitches['D4'];
      break;
    case 2:
      tone = pitches['E4'];
      break;
    case 3:
      tone = pitches['F4'];
      break;
    case 4:
      tone = pitches['G4'];
      break;
    case 5:
      tone = pitches['A4'];
      break;
    case 6:
      tone = pitches['B4'];
      break;
    case 7:
      tone = pitches['C5'];
      break;
  }
  return 0.1 * Math.sin(2 * Math.PI * t * tone);
}