tone.js脉搏波意外变化

Question

我有下面的tone.js代码，它们使用脉冲波进行了一些微调。在调谐过程的中途，脉搏波的特性会改变，就像脉冲宽度已改变一样。为什么会发生这种情况，我该如何解决？

import Tone from 'tone';

let synth = {
  PULSE1: new Tone.Synth({
    oscillator: {
      type: 'pulse',
      width: 0.5
    }
  }).connect(Tone.Master)
}

let track = {
  transport: {
    bpm: 100
  },

  instruments: {
    PULSE1: {
      notes: [
        ['0:0:0','C4','16n', {}],
        ['0:0:1','D4','16n', {}],
        ['0:0:2','D#4','16n',{}],
        ['0:0:3','D4','16n', {}],
        ['0:0:4','C4','16n', {}],
        ['0:0:5','G3','16n', {}],
        ['0:0:6','C4','16n', {}],
        ['0:0:7','D4','16n', {}],
        ['0:0:8','D#4','16n', {}],
        ['0:0:9','C4','16n', {}],
        ['0:0:10','Bb3','16n', {}],
        ['0:0:11','C4','16n', {}],
        ['0:0:12','D#4','16n', {}],
        ['0:0:13','C4','16n', {}],
        ['0:0:14','F4','16n', {}],
        ['0:0:15','D4','16n', {}]    
      ]
    }
  },

}

Tone.Transport.bpm.value = track.transport.bpm;

track.instruments.PULSE1.notes.forEach(note => {
  let [when, frequency, duration, options] = note;

  Tone.Transport.schedule(time => {
    synth.PULSE1.triggerAttackRelease(frequency, duration, time);
  }, when);
});

Tone.Transport.start();