I helped someone out with this only yesterday via a teams hookup, and am happy to do some 1 on 1 if anyone else needs help,
Basically the steps are:
1) Setup aggregate device
2) Use the logic I/O Utility plugin on the Aux Buss or as an insert in your desired audio channel
3) In the audio chain on the H9000 (use emote) – click the top arrow, select the USB device and route the relevant USB channels to the inputs to the chain. Do the same for the outputs routing the chain output to the relevant USB channels.
If you need some one on one help to get this working, you can make a booking at https://buymeacoffee.com/godlikeprod/e/18240
