That’s interesting. Not to bore anyone, but I have come a long way trying to improve the standard sound on 3 MacBook Pros starting in 2010. I started with SRS iWow for iTunes (which was software included with a ViewSonic external display), then switched to Audio Essentials, and after that was no longer being supported I found DPS which up to OS Catalina was excellent. I think it started out as an iTunes Plug-in. I don’t want to use this forum to knock DPS but I believe there is one other sound enhancer available for MacOS in case anyone has reached a dead end with DPS or wants to try a temporary alternative.