private function readId3v1Body($fp) {
        $this->tags1['song'] = trim(fread($fp, 30));
        $this->tags1['artist'] = trim(fread($fp, 30));
        $this->tags1['album'] = trim(fread($fp, 30));
        $this->tags1['year'] = trim(fread($fp, 4));
        $this->tags1['comment'] = trim(fread($fp, 28));
        fseek($fp, 1, SEEK_CUR);
        $this->tags1['track'] = ord(fread($fp, 1));
        $this->tags1['genre'] = ord(fread($fp, 1));
        return 128;
    }