downloaded WAV file will not play - php

Question

I am downloading a WAV file from my remote server (Centos 5.8). using the following PHP script:
header('Content-Description: File Transfer');
header('Content-Type: audio/x-wav');
header('Content-Disposition: attachment; filename=' . basename($realLink));
header('Content-Transfer-Encoding: binary');
header('Expires: 0');
header('Cache-Control: must-revalidate');
header('Pragma: public');
header('Content-Length: ' . filesize($realLink));
ob_clean();
flush();
readfile($realLink);
When I try to play the downloaded file using either Windows Media Player or Itunes, it will not play. Even though the downloaded WAV on my local machine has a file size that is the same as the version of the file on the server, the downloaded file's properties show 00:00 length and will not play. Also, the file downloads and plays just fine if I manually download it using ftp. The apparent corruption only happens when I use the above script to download. I would appreciate any help with this.

Answer 1

The following are valid MIME types for WAVs:
audio/vnd.wave
audio/wav
audio/wave
audio/x-wav
You're using application/x-wav. See here and here for references.

Answer 2

This code work for download wav audio.
$ctype ='audio/x-wav'; // file type
$filepath = '/var/www/html/audio.wav';//absolute url
$size = filesize($fichero); // size of file
$name = basename($fichero); // name of file
$fp=fopen($fichero, "rb");
if ($size && $ctype && $fp) {
header("Pragma: public");
header("Expires: 0");
header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
header("Cache-Control: public");
header("Content-Description: wav file");
header("Content-Type: " . $ctype);
header("Content-Disposition: attachment; filename=" . $name);
header("Content-Transfer-Encoding: binary");
header("Content-length: " . $size);
ob_clean();
fpassthru($fp);
}