Unable to adjust audio.

[TheronRogers]

I was hosting a Sunday School class meeting while sitting in the class with my laptop. Zoom did not pick up my air pod as the available speaker as it normally does. So, the delayed audio was being broadcast to the entire class from the speaker in my laptop. This was 1/2 or 3/4 of a second after they heard the voice of the teacher in the room. My problem was that the controls on my laptop (HP Envy), did nothing. I could not turn the audio off or even turn down the volume using the laptop?  I was finally able to turn off the "audio from the computer".  Any idea why the meeting audio could not be adjusted or shut off?