Thanks for the replies. I am using the Blue Truth models of BetterCables AES cables
I've had good luck with their cables in XLR and RCA and USB in the past.
I2S - how do to check/change the PIN configuration between the ifi and denafrips. They both have I2S out, and I can get an hdmi cable, but, beyond just hooking it up, I'm not sure how to proceed.
I did notice that, when using the ifi as a streamer, I'm not able to change the tidal settings on Master to allow fixed volume, mqa pass through, or dedicated source.
I have changed this with the USB directly to the denafrips from my computer - turning / leaving pass-through off as the denfrips doesn't do mqa.