Volumio 3 - ADC Input + USB Output

Hi, I have a rpi4 with a HifiBerry DAC+ ADC Pro hat. I would like to use the HifiBerry board for analog input, and then use USB output as the playback option for Volumio. It seems that the only way for Volumio to recognise the analog input, is to configure the hat as a playback device. I do not want the hat as the playback device as I need a digital out. Is there any way to configure Volumio (or rpi) so that the HifiBerry board is used only for analog input and I can still configure USB output? Thanks - hope that makes sense!