Trouble with audio when watching/listening to video and audio clips in meetings

I have the same problem. I have a violin teacher who has two microphones, one for playing in and one for speaking in. I can only hear speech not the playing. The mikes are close enough together that I ought to be able to hear when she's playing even if not through her second mike. How can I increase the sensitivity of the pickup? I have obviously looked at settings both in Zoom and on my Windows laptop while things are in progress but nothing seems to make a difference.

This sounds like my issue as well.  I co-teach a musical theatre/Sondheim course on Zoom and ever since switching laptops, whenever anyone plays a video clip, as I said, I can hear most of the vocals but not the accompanying music (and even the vocals fade in and out.)  No one else on the Zoom class has this issue at all, and I don't have similar sound issues in any other program (and didn't used to have these issues on a previous laptop.)  I have, with the help of several friends, tried adjusting every single audio setting on Zoom and on my computer that I can find, with no luck.

I have the same problem. I teach a fitness class with music. When I'm speaking, the music goes faint for the others in the Zoom. This problem was rectified last year, but in the past 2 weeks I've noticed the settings are not as detailed as before. I cannot adjust the background noise.

Hello there,

I'm sorry for the inconvenience you experienced and the late response.

Kindly check out these resources:
Configuring professional audio settings for Zoom Meetings
Configuring audio for music and singing

Please let us know if this helps or if you need further assistance.