code: def get_sound(self, title, group):
          '''
          Retrieve sound @title from group @group.
          '''
          return self.sounds[group.lower()][title.lower()f get_sound(self, title, group):
          '''
          Retrieve sound @title from group @group.
          '''
          return self.sounds[group.lower()][title.lower()]
docs: Retrieve sound @title from group @group.