Catalina actually affected my photos where I could only see grey boxes so Apple tech recommended I update to Big Sur, so I did. It was unfortunate that I ever updated to Catalina in the first place as that is where my problem on my Macbook pro 2013 started. As far as the internal speaker distortion, it is my right speaker. The bottom line is Apple can't fix it. I was on the phone with tech support for at least 1 hour yesterday and she tried over 10 different potential fixes. Nothing worked. Then she said the only other thing you can do is go to an Apple certified repair store as it is a hardware problem. No way I'm spending money to fix my speaker because it was caused by the update. So she set me up with tech support today to reinstall Big Sur. Didn't solve the problem. They either can't or won't. I think it's the later. Apple needs to be better. Making more money by creating issues so we have to spend more money is part of their strategy, e.g. the version of iphone that came out that we could no longer charge and plug in ear buds at the same time. Forced a lot of people to buy bluetooth earbuds. I refuse. As someone else said in an earlier reply, I'm surprised a class action lawsuit hasn't been filed against Apple yet. Consumer protection would be a next good step.