Purchased a HomePod just before Christmas to replace a Bluesound Pulse in my bedroom and sounds great. As I use it mainly in the mornings have tried to use the equaliser to adjust to bass as it can be a bit overpowering at times but cannot get it to work. Since setting up there has been a lock symbol on the HomePod and Apple TV icon and although seems to work ok perhaps this is why the equaliser will not work. Have looked on the Apple Forum and documentation but the information seems to be a bit sparse in this respect.