public function setGenre($genre) {
		if (is_numeric($genre)) {
			$this->addOrChangeMetaData('gnre', $this->number($genre + 1, 16));
			// $this->addOrChangeMetaData('gnre', ID3v1Genres::of($genre));
		} else
			$this->addOrChangeMetaData('gen', $genre);
	}