let DRUMS = {

  notes: [

    { pitch: 36, quantizedStartStep: 0, quantizedEndStep: 1, isDrum: true },

    { pitch: 38, quantizedStartStep: 0, quantizedEndStep: 1, isDrum: true },

    { pitch: 42, quantizedStartStep: 0, quantizedEndStep: 1, isDrum: true },

    { pitch: 46, quantizedStartStep: 0, quantizedEndStep: 1, isDrum: true },

    { pitch: 42, quantizedStartStep: 2, quantizedEndStep: 3, isDrum: true },

    { pitch: 42, quantizedStartStep: 3, quantizedEndStep: 4, isDrum: true },

    { pitch: 42, quantizedStartStep: 4, quantizedEndStep: 5, isDrum: true },

    { pitch: 50, quantizedStartStep: 4, quantizedEndStep: 5, isDrum: true },

    { pitch: 36, quantizedStartStep: 6, quantizedEndStep: 7, isDrum: true },

    { pitch: 38, quantizedStartStep: 6, quantizedEndStep: 7, isDrum: true },

    { pitch: 42, quantizedStartStep: 6, quantizedEndStep: 7, isDrum: true },

    { pitch: 45, quantizedStartStep: 6, quantizedEndStep: 7, isDrum: true },

    { pitch: 36, quantizedStartStep: 8, quantizedEndStep: 9, isDrum: true },

    { pitch: 42, quantizedStartStep: 8, quantizedEndStep: 9, isDrum: true },

    { pitch: 46, quantizedStartStep: 8, quantizedEndStep: 9, isDrum: true },

    { pitch: 42, quantizedStartStep: 10, quantizedEndStep: 11, isDrum: true },

    { pitch: 48, quantizedStartStep: 10, quantizedEndStep: 11, isDrum: true },

    { pitch: 50, quantizedStartStep: 10, quantizedEndStep: 11, isDrum: true },

  ],

  quantizationInfo: {stepsPerQuarter: 4},

  tempos: [{time: 0, qpm: 120}],

  totalQuantizedSteps: 11

};

​

// MIDI notes for Drums

// 36: Bass Drum 1 

// 38: Acoustic Snare 

// 42: Closed Hi-Hat 

// 45: Low Tom

// 46: Open Hi-Hat 

// 48: Hi-Mid Tom

// 50: High Tom

let kit = new Tone.Players(

    { 

      "36" : "samples/505/kick.mp3",

      "38" : "samples/505/snare.mp3",

      "42" : "samples/505/hh.mp3",

      "46" : "samples/505/hho.mp3",

      "50" : "samples/707/Tom-707-Hi.mp3",

      "48" : "samples/707/Tom-707-Mid.mp3",

      "49" : "samples/707/Crash-707.mp3", // Crash cymbal

      "45" : "samples/707/Tom-707-Low.mp3", 

      "51" : "samples/707/Ride-707.mp3" 

    }

);

kit.toMaster();

​

// Initialize the model

let music_rnn = new mm.MusicRNN('https://storage.googleapis.com/magentadata/js/checkpoints/music_rnn/drum_kit_rnn');

music_rnn.initialize();

let rnn_steps = 20;

let rnn_temperature = 1.5;

​

// continueSequence returns a Promise

music_rnn

  .continueSequence(DRUMS, rnn_steps, rnn_temperature)

  .then(play);

​

function play(sample){

  console.log(sample);

​

  // Adapt note array to a format Tone.Part understand (objects must include a 'time' property)

  for(note of sample.notes){

    // Assume 120bpm -> * 0.5

    note.time = note.quantizedStartStep * 0.5 * 0.25;

  }

​

  let part = new Tone.Part(function(time, value){

    // let duration = (value.quantizedEndStep - value.quantizedStartStep) * 0.5;

    let s = kit.get(value.pitch).start();

    console.log(value);

  }, sample.notes).start(0);

​

  Tone.Transport.start();

}

​

​

​