Schiit Yggdrasil

I have the Grace Design m920 pre-amp dac but I am considering purchasing the SCHIIT's Yggdrasil multibit dac and use the Grace as a pre-amp. 
Can I do this using the balance inputs and outputs on both units? 
Schiits said the Grace cannot be connected to the Yggdrasil b/c the Grace has no digital outputs and the Yggdrasil has no analog.

Also, I am streaming TIDAL using the APPLE TV connected to Grace m920...Schiit said this may trigger the lower spec clock b/c it is locked to 48kHz and has re sampling.
If the APPLE TV is connected to the Grace would the above be true and would another streaming device be more appropriate?

thanks,
frank