This video shows how you can upload meida files in to PBXPlus and then be used in the menu through call flows. You can upload prerecorded audio files or record yourself real time or feed your script and have a text to speech to record your script.

If you like to add hold music media or recordings, something to use as a greeting or business voicemails in your call flows to play for the callers when an inbound call is made, click the Calls Media tab and add media by simply drag and drop your media files. or upload files from cloud apps like Google Drive, Box and Dropbox.