There doesn't necessarily need to be amplification if the feedback resistor is left off, in which case it just acts of a buffer. I guess it's just a bonus that two inverting stages cancel out. The reason I need the amplification is if I want to bring the signal up to TTL level, or go from 3.3v TTL to 5v TTL. (Worse case, I could use the voltage divider at the output to shift from 5v TTL to 3.3v TTL)
The bypassing is so I can have one TH part (Wima MKS02) and/or two NP0 caps. Probably overkill, yes.
So, my problem is that where I'm tapping the DSD1608 chip, the signal isn't very strong. Also, the Wolfson isn't 5.0v compliant, it expects 3.3v logic. So, what I'm assuming is that the DSD signal is basically needs to be 3.3v TTL logic and I either need to buffer the signal at a minimum to drive the signal a couple feet, or buffer and level shift down to 3.3v TTL. Same with PCM I'm assuming (need buffer and/or level shifting to 3.3v).
The bonus of this approach, I could ship the data through a transformer to a BNC connector then out to an external DSD DAC and then use the same little board on the other end as well. So, some flexibility.... but more than anything, it's to experiment I guess and hope I get lucky and it works!