We just got Studio and I was watching a tutorial from another user who was showing how you could share computer audio via Screencast-O-Matic. I downloaded the current version and do not see this option, which in the tutorial was underneath the "Narration" option in my picture below. I looked at the Screencast-O-Matic site, and they indicated that this was a premium feature. Does Studio give us the premium version? If so, would there be a reason I do not see this option? I am on a Mac running 10.12.6.
I am experiencing the exact same issue. An Instructure manager assured me that it was possible, but I have now had a support ticket for this exact issue open for a month now, and no one seems to be able to figure it out.
Thank you; please let me know if you hear from them! As far as I know, this is supposed to be the full version of Screencast-O-Matic and so that feature should be available.