Journalists should also be wary of publishing raw audio leaked from Zoom meetings, particularly if the source is not sure whether audio watermarking was enabled or not. Zoom mentions that in order to identify the participant who recorded the meeting, they need at least two minutes of audio from the meeting, though it stands to reason that shorter snippets may also be identifiable if they happen to contain the audio watermark. Nonetheless, when recording a Zoom meeting, it is best to avoid using Zoom’s built-in recording option and to capture the meeting using a third-party audio/video recorder. Thus, choosing 'Join Audio' then 'Join with Computer Audio' is the only way to get audio working reliably.It is not immediately apparent at what point Zoom injects its “ ultrasonic” audio watermark into the audio stream - whether this happens only if a meeting attendee presses the Record button in Zoom or if the audio stream is watermarked prior to that point. When I close the that window, I expected to join audio, but looking at the button, it is still prompting me to join audio. Since my audio was not working in the call, I would retest my settings or try different settings. If I selected the larger 'Join Audio' button, I get a choice of 'Join with Computer Audio' or 'Test Microphone and Speaker'. But I would still not hear/be heard in the Zoom call. When I click the 'little up arrow' it brings up setting choices, I would sometimes change the settings but always test them and then close the window. Why did I (and possibly others) repeatedly miss these obvious steps? If you do not setup Zoom to join audio automatically, the button in the lower left corner of Zoom will ask you to 'Join Audio' with a little up arrow. Select 'Join with Computer Audio' (not test settings).

Click the 'Join Audio' button (not the little 'up arrow').These Steps for Each Call Fixed My Problem: I found a solution to this that was really a user error, possibly related to a change in Zoom (or just me being daft).

Test zoom before meeting