code: function add(config) {
      const src = file.getSupportedFile(config.src || config.url || config.data || config);
      const sound = new Sound(Object.assign({}, config || {}, {
          src,
          context,
          destination: bus.gain
      }));
      sound.isTouchLocked = isTouchLocked;
      if (config) {
          sound.id = config.id || config.name || '';
          sound.loop = !!config.loop;
          sound.volume = config.volume;
          sound.effects = config.effects || [];
      }
      bus.add(sound);
      return sound;
  }
docs: /*
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