uploading mp3 files

Make sure that your mp3 files are not larger than the php.ini setting for file size. The two entries to look for are upload_max_filesize and post_max_size.

i am absolutely sure they r not the biggest mp3 file is about 50mb, but limit in my php.ini is 2gb n today i have checked the mime types of those files, they r not audio/mpeg or any other mp3 mime type but they r application/octet-stream, i did add this mime type into mimes.php config, but nothing changed