Audient Evo8 split into mono inputs and stereo outputs

alsa-project/alsa-ucm-conf issue #816 was opened from JMWalkman:

Hi!

So based on the work that @motolav and @perexg did on the evo 4, I managed to create a similar config file for the audient evo8 to expose separate mono inputs and stereo output pairs

It's just that I'm not sure how to submit it to this repo, but i'd like this to be a part of the default experience for more people who have the interface like me. I've been using it for a couple of weeks and it's been awesome, so here's the contents of the file

```
context.modules = [
    # ------------------ INPUTS (Mics 1-4 + Loopback) ------------------
    { name = libpipewire-module-loopback
      args = {
        node.name = "EVO8_Mic_1"
        node.description = "EVO 8 Mic/Inst 1"
        capture.props = { target.object = "alsa_input.usb-Audient_EVO8-00.pro-input-0" audio.position = [ AUX0 ] stream.dont-remix = true node.passive = true }
        playback.props = { media.class = "Audio/Source" audio.position = [ MONO ] }
      }
    }
    { name = libpipewire-module-loopback
      args = {
        node.name = "EVO8_Mic_2"
        node.description = "EVO 8 Mic 2"
        capture.props = { target.object = "alsa_input.usb-Audient_EVO8-00.pro-input-0" audio.position = [ AUX1 ] stream.dont-remix = true node.passive = true }
        playback.props = { media.class = "Audio/Source" audio.position = [ MONO ] }
      }
    }
    { name = libpipewire-module-loopback
      args = {
        node.name = "EVO8_Mic_3"
        node.description = "EVO 8 Mic 3"
        capture.props = { target.object = "alsa_input.usb-Audient_EVO8-00.pro-input-0" audio.position = [ AUX2 ] stream.dont-remix = true node.passive = true }
        playback.props = { media.class = "Audio/Source" audio.position = [ MONO ] }
      }
    }
    { name = libpipewire-module-loopback
      args = {
        node.name = "EVO8_Mic_4"
        node.description = "EVO 8 Mic 4"
        capture.props = { target.object = "alsa_input.usb-Audient_EVO8-00.pro-input-0" audio.position = [ AUX3 ] stream.dont-remix = true node.passive = true }
        playback.props = { media.class = "Audio/Source" audio.position = [ MONO ] }
      }
    }
    { name = libpipewire-module-loopback
      args = {
        node.name = "EVO8_Loopback_In"
        node.description = "EVO 8 Loopback Input"
        capture.props = { target.object = "alsa_input.usb-Audient_EVO8-00.pro-input-0" audio.position = [ AUX4 AUX5 ] stream.dont-remix = true node.passive = true }
        playback.props = { media.class = "Audio/Source" audio.position = [ FL FR ] }
      }
    }

    # ------------------ OUTPUTS (Outputs 1-4 + Loopback) ------------------
    { name = libpipewire-module-loopback
      args = {
        node.name = "EVO8_Out_1-2"
        node.description = "EVO 8 Output 1-2"
        capture.props = { media.class = "Audio/Sink" audio.position = [ FL FR ] }
        playback.props = { target.object = "alsa_output.usb-Audient_EVO8-00.pro-output-0" audio.position = [ AUX0 AUX1 ] stream.dont-remix = true node.passive = true }
      }
    }
    { name = libpipewire-module-loopback
      args = {
        node.name = "EVO8_Out_3-4"
        node.description = "EVO 8 Output 3-4"
        capture.props = { media.class = "Audio/Sink" audio.position = [ FL FR ] }
        playback.props = { target.object = "alsa_output.usb-Audient_EVO8-00.pro-output-0" audio.position = [ AUX2 AUX3 ] stream.dont-remix = true node.passive = true }
      }
    }
    { name = libpipewire-module-loopback
      args = {
        node.name = "EVO8_Loopback_Out"
        node.description = "EVO 8 Stereo Loopback Output"
        capture.props = { media.class = "Audio/Sink" audio.position = [ FL FR ] }
        playback.props = { target.object = "alsa_output.usb-Audient_EVO8-00.pro-output-0" audio.position = [ AUX4 AUX5 ] stream.dont-remix = true node.passive = true }
      }
    }
]
```

Issue URL     : https://github.com/alsa-project/alsa-ucm-conf/issues/816
Repository URL: https://github.com/alsa-project/alsa-ucm-conf