1.js

//somewhere else in your class


function Voice() {
 this.voice = {
  Agnes: {
    locale: 'en_US',
    example: 'Isn\'t it nice to have a computer that will talk to you?'
  }
  
  //Will return an array that looks like [{value: 'Agnes'}]
  this.voiceValues = Object.keys(voices).map(function(voice){ return {value: voice}});
}

Voice.prototype.init = function(config) {
  
  config
    .map('say', this.say, [
  { name: 'words', type: 'text'},
  { name: 'voice', type: 'radio', value: this.voiceValues },
  { name: 'rate', type: 'range', min: 90, max: 720, step: 1})
}

Voice.prototype.say = function(words, voice, rate) {
  voice = this.voices[voice];
  
  //Logic here.
}