In the device setting from Roon i can not choose the roon DSP mode,
only device volume an fixed volume can be set(Roon DSP mode not available in the setting).
In the Rose RS250 in the software setting the volume switch is set to ‘off’.
The output is USB to the Kii three control USB input.
I this a question for Roon Labs?
Sure, has nothing to do with Rose, but perhaps with your remote → for DSP settings you’ve to use a tablet or Windows/iOS device, but not a mobile,
I Have the problem reported to Roon Labs