I’ve had the echo/crackling issue in the past, but at some point with my new laptop the issue disappeared. (Now VMWare gets the dubious honor of having horrific crackling sounds with every solution tried, figures

On a side note, a couple games that used to work before I re-installed Windows 10 now either hang or lag to the point of being nonfunctional. I’ve tried this on multiple machines (I use the same .iso file but for some reason each machine runs differently despite the exact same install.) It feels random whenever I’ve used VirtualBox as to whether or not sound functions or certain games work. It also doesn’t recognize discs in D: unless I have the disc in before I boot.
My main question is the audio—why is it doing this now and how do I adjust in the VM settings if it doesn’t work in the guest? (I also can’t connect to wifi despite following directions online.) Any other answers to my questions would be great. I like this software a lot but I’m often fighting it just to get it to do basic things.
Thank you!