Screen sharing while using a screen reader

Hi, is there a way of getting Zoom to share only the sound coming from the Windows default onboard soundcard? I'm totally blind and use the Jaws screen reader, but when I screen share videos with computer sound toggled on, all participants can hear my screen reader as well as the audio from the video, even though I have my screen reader routed through a USB soundcard not the default onboard soundcard. It seems that Zoom includes any sounds coming from any audio device attached to the laptop? Any suggestions gratefully recieved.