So I did end up getting the HQ analog input module for my 3400.
For me / my system / ears, feeding the digital signal from Bryston BDP-2, to Yggdrasil DAC, to the new analog (XLR) input on the Lyngdorf sounds better. The 3400 is still doing room correction, preamp, and amp duties.
Someday I'll try sending the digital signal directly to the 3400 again and see if I still feel the same way.
For me / my system / ears, feeding the digital signal from Bryston BDP-2, to Yggdrasil DAC, to the new analog (XLR) input on the Lyngdorf sounds better. The 3400 is still doing room correction, preamp, and amp duties.
Someday I'll try sending the digital signal directly to the 3400 again and see if I still feel the same way.