NEW FREE Online Sequencer MELODY GENERATOR 2022 [NOT CLICKBAIT] [NO VIRUS]

[pseudoname]

haha just kidding i made it betterer

Code:

function generateMelody(instr=instrument, swing=false, beatCount=16, keySignature='Minor', noteVarianceFactor=30, octave=5, note=1) {
  note = clamp(note, 1, 12) | 0;
  octave = clamp(octave, 2, 7) | 0;
  while (noteVarianceFactor < 10) noteVarianceFactor += 5;
  while (beatCount < 1) beatCount += 1;

  const notes = [];
  let noteDict;
  switch (keySignature) {
    case undefined: noteDict = settings.pianoNotes; break;
    case 'Major': noteDict = settings.scales[1].slice(0, 7); break;
    case 'Minor': noteDict = settings.scales[13].slice(0, 7); break;
    case 'play infinitode 2': noteDict = ['C', 'D#', 'F', 'G', 'A#']; break;
    default: throw new Error("That's not a real key signature. Come on, man. You're better than this. (valid key signatures are 'Minor', 'Major', or undefined)")
  }

  let midTendencyFactor = [10, 7, 4, 0, -5, -10];

  function createNote(time, pitch, length, ID) {
    notes.push(new Note(song, pitch, time, length, ID));
  }

  function randomlyShiftPitch() {
    let lowerBound = -noteVarianceFactor + midTendencyFactor[octave-2];
    let higherBound = noteVarianceFactor - midTendencyFactor[octave-2];
    let offset = Math.round(
      (Math.random() * (higherBound - lowerBound) + lowerBound) / 10
    );
    note += offset;
    while (note > noteDict.length) {
      if (octave == 7) {
        note = noteDict.length;
      } else {
        note -= noteDict.length
        octave += 1
      }
    }
    while (note < 1)
      if (octave == 2) {
        note = 1
      } else {
        note += noteDict.length
        octave -= 1
      }
  }
  const quarterBased = [[0, 2], [1, 3], [0, 1, 2], [0, 2, 3], 0, 2, [0, 3], null],
    thirdBased = [0, 8/3, [0, 8/3], [0, 4/3, 8/3]],
    riff = [
      [0, 1, 2, 3],
      [0, 1, 6/3, 8/3, 10/3],
      [0/3, 2/3, 4/3, 6/3, 8/3, 10/3],
      [0/3, 2/3, 4/3, 2, 3]
      // 0/3 and 6/3 are present so the triplets are clearer
    ],
    riffing = !swing;

  let beatCounter = 0, riffChancemaker = 0;
  function generateBeat() {
    let beatNotes = swing ? thirdBased[(Math.random() * thirdBased.length) | 0] : quarterBased[(Math.random() * quarterBased.length) | 0]
    if (beatNotes === null) {
      ++beatCounter;
      if (Math.round(Math.random())) riffChancemaker += Math.round(Math.random())
      if (riffChancemaker == 4) generateRiff();
      return;
    };
    if (typeof beatNotes == 'object') {
      for (let x of beatNotes) {
        randomlyShiftPitch(note, octave);
        let noteLength = ((x | 0) === x) ? 1 : 2/3;
        createNote(x + (beatCounter * 4), `${noteDict[note-1]}${octave}`, noteLength, instr)
      }
    } else {
      randomlyShiftPitch(note, octave)
      let noteLength = ((beatNotes | 0) === beatNotes) ? 1 : 2/3;
      createNote(beatNotes + (beatCounter * 4), `${noteDict[note-1]}${octave}`, noteLength, instr)
    }
    ++beatCounter;
    if (Math.round(Math.random())) riffChancemaker += Math.round(Math.random())
    if (riffChancemaker == 4) generateRiff();
  }

  function generateRiff() {
    if (!riffing) return;
    while (riffChancemaker > 0) {
      let beatNotes = riff[(Math.random() * riff.length) | 0];
      for (let x of beatNotes) {
        randomlyShiftPitch(note, octave)
        let noteLength = ((x | 0) === x) ? 1 : 2/3;
        createNote(x + (beatCounter * 4), `${noteDict[note-1]}${octave}`, noteLength, instr)
      }
      riffChancemaker -= 2
      beatCounter += 1
      if (riffChancemaker < 0) break
    }
  }

  while (beatCounter < beatCount) generateBeat();
  exec(() => {
      for(let note of notes) song.addNote(note);
      SequencerView.repaint();
  }, () => {
      for (let note of notes) song.removeNote(note);
      SequencerView.repaint();
  })
}

now it instantly inserts the new melody into the sequencer, and it supports undo
you can also make it whatever instrument you want
have fun