We suggest you to use ftp to upload audio files.
If you would like to upload audio files and add to your site, please do the following steps.
1) Login to your FTP
2) create a folder in the public_html folder (Eg. audio)
3) Upload the audio file into the "audio" folder
4) The audio file will have a URL link,
http://www.yourdomain.com/audio/file.mp35) Create a hyperlink, <a href = "
http://www.yourdomain.com/audio/file.mp3">,
6) Copy the hyperlink and paste it to the source code of your preferred webpage