text: this.defaults = {
    hotkeys: {
      enterMode: ['alt+ctrl+s'],
      next: ['right'],
      previous: ['left'],
      nextBlock: ['down'],
      previousBlock: ['up'],
      pauseOrResume: ['space'],
      slowdown: ['['],
      speedup: [']'],
      exitMode: ['esc'],
    },
    rate: '1.3',
    voice: 'US English Female TTS (by Google)',
    delimiter: 'sentence',
    maxLength: 200,
    regexFilter: '\\S',
    regexIgnore: '^\\[[\\w ,]*\\]$',
  }
  