Submitted by Debbie DiBacco (Director of Customer Service for CypherWorx)
FIRST: I'd suggest downloading a free audio recording program called "Audacity" - that's what we use to record and then upload audio to these slides. (Here's the link: https://www.audacityteam.org/) Then you can easily edit/save the audio file. (See the screenshots below on the two steps you need to record and save/export in Audacity).
Then, once you have your recording, you can upload. What I've noticed is that you can't watch the "Current Audio: None" section. You much watch the "editing information" section on Create a Course. See the next two screenshots on that.