Piano not audible on Windows 11

I am having a very similar issue. I have been using Zoom since Covid. My speakers and microphone worked flawless until 2 weeks ago. I have never had any issues. The speaker does not work anymore but the microphone is fine. I take lessons and my teacher uses music. I cannot hear music anymore. I can hear her speak sometimes and she can hear me sometimes. I took it to the computer store and I thought it was fixed. But the speaker and music (mostly piano) does not work anymore. I tried my husbands Window 11. His does not work either. My teacher said some of her other students have had no issues with Zoom. But when I read about the issue speakers on this website it looks like this problem has been going on for a while. I think it eventually is a issue that catches up to peoples computer after a while.  Today was the first day I used it after being at the computer shop and I could hear no music. I hope someone replies to this issue. Because I am out of ideas. I think its a Zoom problem.  Most people probably use Zoom for business. Not for lessons with music. Like us.