Someone please help me on this...I want to make a user download music from my server...however this script displays gibberish stuff on the browser...how do i make it download?

Ignore the header warnings...

<?php

//ob_start();

//session_start();

$filepath="./cool/scripts/files/music/01.mp3";

$file_extension = strtolower(substr(strrchr($filepath,"."),1));

echo $file_extension;

$filename = realpath($filepath);

$file = @fopen($filename,"rb");

echo $filename;

            switch ($file_extension) {

               case "pdf": $ctype="application/pdf"; break;

               case "exe": $ctype="application/octet-stream"; break;

               case "zip": $ctype="application/zip"; break;

          case "rar": $ctype="application/x-rar-compressed"; break;

               case "doc": $ctype="application/msword"; break;

               case "xls": $ctype="application/vnd.ms-excel"; break;

               case "ppt": $ctype="application/vnd.ms-powerpoint"; break;

               case "gif": $ctype="image/gif"; break;

               case "png": $ctype="image/png"; break;

               case "jpe": case "jpeg":

               case "jpg": $ctype="image/jpg"; break;

               case 'mp3': $ctype='audio/mpeg'; break;

               case 'mpg': $ctype='video/mpeg'; break;

               case 'avi': $ctype='video/x-msvideo'; break;

               default:    $ctype='application/force-download';

           }

  // set headers

  header("Pragma: public");

           header("Expires: 0");

           header("Cache-Control: must-revalidate, post-check=0, pre-check=0");

           header("Cache-Control: private",false);

           header("Content-Type: $ctype");

           header("Content-Disposition: attachment; filename=\"".$filepath. "\";");

           header("Content-Transfer-Encoding: binary");

           header("Content-Length: ".@filesize($filename));

           set_time_limit(0);

            @readfile("$filename") or die("File not found.");

/*   

  while(!feof($file)) {

    print(fread($file, 1024*8));

    flush();

    if (connection_status()!=0) {

      @fclose($file);

      die();

    }

  }

  @fclose($file); */

         //  @readfile("$filename") or die("File not found.");

 // print getenv("SCRIPT_NAME");

?>