Not getting all Audio setting with Zoom PWA on Chromebook

Hi there

I have a chrome book and am using the the Zoom PWA. i teach online classes and need the option to select original sound. I found a video on youtube on how to do this but i do not have the same options in the settings for audio to do this compared to the options that were shown in the video. The only option i have in audio are speaker & microphone. I have attached a screenshot of my options and the options that are in the youtube video. 

Do i need to update my zoom or is there something else i can do?

Thanks in advance

Claire