Topic: Use the Spdif of another interface to connect ADI-2 Pro only for ADDA?
I've got a pretty old firewire interface called mackie onyx 400f,it has lots of Inputs that i really need to use(plug in guitar/bass/stereo mics),and a Spdif I/O.But it's ADDA is out-of-date and the driver cant even work on Win10.
So i wanna buy a ADI-2 Pro and use it as the audio interface of my studio，also it's ADDA(for recording/monitoring)，But I want to keep the Mackie 400f and use it's inputs for recording guitar and other high-impedence instruments（cas ADI-2 don't have this kind of inputs）.
By the way I also get a Focusrite Isa Two preamp,which i still wanna use...
So sums up,I want Mackie's Inputs,Focusrite's Preamp and ADI-2 Pro's ADDA（and use RME as interface）,is there a way to make this happen？
Since I'm not very good at technical stuff,if this can be done，please give me the exact order of how to connect those 3 gears！Some explanation about the signal flow would be best！！！
Thanks A Lot!!!