Should I use USB or SPDIF to send the digital content?
Is content sent via TOSLINK/SPDIF processed at all?
Are either formats lossy?
Which is superior in the audiophile universe?
Thanks, well I've gone through a hell lot of trial and error before making up my mind ^^
The biggest issue with WM8804 is that most companies enslave it to a low resolution clock and their customers expect miracles duh....the "Firestone Bravo" uses a 0ppm clock conditioner from TI, and I can tell you that WM8804 gives the good when it comes to reclocking if it's driven off a nearly perfect clock and linear regulated PSU
CS8416 is still widely used because DIR9001 is indeed limited to 24/96 and WM8804 doesn't do AES/EBU at all.......the major issue is that CS8416 in "high jitter" 192kHz legacy mode exhibits +500ps of jitter at 44.1kHz, duh again: http://www.cirrus.com/en/pubs/appNote/AN339REV1.pdf
Don't mix the 50ps clock recovery of DIR9001 w/ the 50ps reclocking of WM8804, these are two completely different mechanisms...you can check out the AES white papers on Wolfson's site.
It's easy to understand why most companies give up on S/PDIF these days, because it's a terribly obsolete protocol due to its embedded slaved clock that has to be extracted: http://www.gearslutz.com/board/1788545-post2.html
XMOS USB and I2S is all you need, give up on S/PDIF and you'll be just fine