If you save a voice memo on your iPhone and try to upload it to your website as a sound, it doesn’t support the AMR files. It typically saves it onto your desktop as an M4A if you email it to yourself. To convert the file into MP3 format so that your WordPress allows it to upload, you can use www.cloudconvert.com. You can also use the Cloud Convert to convert multiple other types of sound files into numerous different file types.