use wapmorgan\Mp3Info\Mp3Info;
$audio = new Mp3Info($fileName, true);
// or omit 2nd argument to increase parsing speed
$audio = new Mp3Info($fileName);
echo 'Audio duration: '.floor($audio->duration / 60).' min '.floor($audio->duration % 60).' sec'.PHP_EOL;
echo 'Audio bitrate: '.($audio->bitRate / 1000).' kb/s'.PHP_EOL;