I just discovered within Apple iPhone ROON app (when open) the possibility to change volume with the iPhone’s side buttons and it works fine for me.
Hoeever when trying to change audio group’s volume level with the iPhone buttons like this, it doesn’t seem to work. Not for the Group unfortunately but only the first one of my two devices volume changes.
Does anyone of you know how to change Audio Group volume level through iPhone ROON App with iPhone device side buttons, successfully?
I’m not a zone user but according to this (although it’s a year old) it seems that group volume control with the hardware buttons is not possible at all (note the response by Roon to this):