addSoundEffects(sfxIdentifiers, loopings, durations) {
    for (let i = 0, il = sfxIdentifiers.length; i < il; i++) {
      this.addSoundEffect(sfxIdentifiers[i], loopings && loopings[i], durations && durations[i]);
    }
  }
Adds multiple sound effects.
@see addSoundEffect