Sound Check doesn't appear to do anything
When I go into the Home app, select my HomePod and tap on the Details button, I get a settings screen that includes a Sound Check toggle. I thought that, if Sound Check was on, I wouldn't have to keep adjusting the volume up whenever a quiet song came on and then down whenever a loud song came on. This doesn't happen. Do I misunderstand what Sound Check should be doing for the HomePod?
Thanks.
Thom
HomePod, iOS 11.4.1