I’ve got 3 Sonos speakers that I use via Wi-Fi, and I’m attached to that “feature,” because I move them around the house day-to-day according to what I’m doing (and according to which members of the family don’t want to hear what I’m listening to).
I find that I can apply DSP filters to one speaker at a time and it works as one would expect, but that when I group the speakers in any combination, the DSP goes completely away (though it still appears in the Roon interface). The effect I’m using is a pretty severe EQ chop, so there’s no chance that it’s still getting delivered to any of the 3 endpoints and I’m just not perceiving it.
Wondering why I’d see this effect. It’s not a deal breaker, and the mobility of the speakers is more important to me than the DSP effects, so if it’s a question of network throughput, I can live with that response.