Hi,
Thanks for the suggestions.
Fixed volume using Benchmark remote is fine - and that’s what I normally use - but was hoping to find a way of controlling volume from Roon. Using Roon DSP works fine (the oddity in my previous post disappeared when I restarted the DAC.
From some research it seems that what I was hoping to do - get Roon to change the DAC volume control - will only work if the DAC supports HID over USB (and also if the mapping of commands is correct). There’s a thread about it here:
https://community.roonlabs.com/t/volume-controlled-by-roon-on-which-dacs/11465
I’ve emailed Benchmark to ask whether or not the DAC3 supports HID.