Separate sound cards with ALSA backend
I'm relatively new to Ardour so apologies if I ask something trivial. Reading the manual and searching the forums hasn't lead me to an answer...
I run Ardour5 on Fedora27 with the ALSA backend. I try to avoid Jack.
I have a Zoom R24 that I want to use for input, and the output should go to the system sound card. However, in the Audio/MIDI Setup window, whenever I select the R24 for input, it is automatically assigned to output as well. Likewise, when I select the system sound card (HDA Intel) as output device it is automatically assigned to input as well.
So the valid combinations for input and output seem to be: None + any of the others, Any + None, HDA Intel + HDA Intel and R24 + R24.
With R24 selected, I can record all 8 inputs, and with HDA Intel selected I can play tracks through the system audio. In either case I can use the DAW functions of the R24 (buttons, sliders, etc.). So technically everything seems to understand each other.
How can I use the R24 for input and the system sound card for output?