What audio is available in the browser-based app?
All audio options provided by the organizer are supported in the browser-based app. If you do not see all options, it may be related to the webinar type you're joining or the organizer disabled them.
In order to access all available audio features, you should use Google Chrome. If you use another web browser, then some options (e.g., Computer audio) may not be available to you.
View How do I connect to the audio? (Web) to learn more.