php mp3 headers in google chrome

Question

I have this in a php to show a mp3 file, it code works fine on firefox and explorer but in chrome it not work. The chrome player appears but no sound and not increases time

$ext = strtolower(substr(strrchr($filename,"."), 1));
$ctype = "audio/mpeg";
header('Expires: Sat, 26 Jul 1997 05:00:00 GMT');
header('Last-Modified: ' . gmdate( 'D, d M Y H:i:s' ) . ' GMT');
header('Cache-Control: no-store, no-cache, must-revalidate');
header('Cache-Control: post-check=0, pre-check=0', false);
header('Pragma: no-cache'); 
header("Content-Type: $ctype");
header("Content-Length: " . $len);