Volume control Digi2 Pro with Ropieee

Is there a way other than DSP to control the volume witn a combination of a HifiBerry Digi2 Pro with a RPi 4 on Ropieee as a Roon bridge?
Can’t find anything concrete, but I doubt that there is an easy solution.

You can’t. The Digi Pro is a digital device, hence no volume control.

Clear enough and thank you