I have viewed several videos with this question and they all point to accessing my audio profile under settings. I don't see/have it. Only options I appear to have are Telephone audio and Computer audio. That's the extent of my audio settings. Right now when we livestream, the music is choppy and/or nonexistent. The regular voice audio streams very well. 

What might be the issue and how can it be fixed if I cannot access an expanded audio profile? I have clicked my picture, gone to settings as instructed, but do not see what the instructors are pointing to.

We plan to provide some online lectures to about 2,000 students, and we have to check all the log data so we can pay for students who participate in this lecture.

But the problem that we have is there is so many students who has the same name(literally the exact same name), so as soon as we find them, we tell them to change their name. (ex) SinatraA / SinatraB)

And base on the last experiences, when we extract the participant log data, We cannot find "the changed" nicknames. (There is Sinatra, but no SinatraA)

I just wondering there are technical functions that we can find out all the original nicknames & changed ones. (e.g. [nickname] Sinatra [Pariciapation time] 20:00 / [nickname] SinatraA [Pariciapation time] 40:00)

I have been trying to sort out live transcription for weeks now, with no luck. When I go into Advanced meeting settings in my account, the only options are for manual captions - see below: