Solution is easy! If the driver has an option to report the fastest latency (the digtal i/o) the pinging will work on mixed cards. The pinging is done on a per i/o basis not the whole card. Cubase just can´t handle if the i/o latency of a digital pair is faster then the driver reported analogue i/o latency. A simple tick box that would give the option to report the digital i/o latency to the driver would fix this.

Not that I need it on my 9652...

Cheers
Vincent

Edit;
When I say easy, I mean the concept is easy, not that it would be easy to program or that RME is at fault not adding this. I have no idea how easy it would be that ad this and if it would cause other issues.

Ping is for external fx. Like you you connect an AD/DA adat device to your AIO and a couple of compressors to that AD/DA. Cubase can ping external FX on an individual basis and after that they are sample accurate to the daw. Only thing is since it can´t handle negative delay (design flaw by steinberg) it doesn´t work on 9632 and AIO.

It is true, now the Analogue outputs are not in sync, but that is not the issue. The adats are now in sync to the daw internally and you can for example do wet/dry on your external compressors without phase issues. You then output the daw to the analogue outs.
Hope this makes it a little clearer, if not please ask.

And you are right the analogue latency is the best general choice, but it would be a nice option for some.

No negative latency if using the raydat and pinging will work fine!
But remember that not all AD/DA are created equal. so the FF latency will not be the same as the Aurora. Which if you record from all 16 inputs at the same time, does need some care to use the same hardware for phase related sources. Same if you would mix from those 16 outputs in analogue summing.

I think this will work. Cubase will ping the roundtrip per extFX, which if great if you also include some digital external FX as these will have even more latency because of their converters.