I don't want to confuse
@Lensflair but thought I would add this as a "new" wrinkle that just happened to me for anyone else following this.
I don't remember what speaker setup he said he has.
I have an Atmos 7.1.4 setup, meaning I have your standard 5.1 + side surrounds + 4 overhead speakers.
I normally set up sound in Windows 11 as 7.1.
But of course I still listen to a lot of 5.1.
Windows likes to treat side surrounds as rear surrounds, nothing new here, but on my system, playback of 5.1 the rear speakers were always active and the side surrounds were silent.
Not the case now, and I have to go into Windows sound and switch from 7.1 to 5.1 else the side surrounds become the "rears". bummer.
Something in recent Windows update? Not sure. I do know something changed in latest Intel driver update as "exclusive mode" totally destroys the sound for me in Foobar.
Still checking this out. I'll get there, and for now not using exclusive mode in Foobar solves that problem. Hmm turned off exclusive mode in Windows Sound, will see what happens.
Ah, Windows. No wonder it confuses Mac users. I've been using Windows since the first version and sometimes it confuses hell out of me.