That just means you are going deaf. The high frequencies are the first to go!

But jokes aside, I have not noticed that. I have the latest app update and firmware update.

I am probably not one to comment on this because for the most part, by EQ settings stay flat. I do not feel the need to adjust them for every song or genre of music. I just listen to music mostly, as the artist and engineers intended the mix to sound.

Yes, a good guess. And that is, surely, part of the issue. I do have hearing loss above 6 kHz whereas my 14  year old grandson has no problem hearing up to 20 kHz.

That’s why I like to boost the treble a tad to compensate. And I’m still hearing a significant difference when adjusting the treble control on my non-Sonos music system. Perhaps the Sonos treble control does not impact frequencies below 6 kH in the range of my hearing. But I used to hear a significant change when adjusting the treble before the update. Maybe that treble crossover frequency was changed in the update.