kristoffer
OK, so since my FW1884 does not have AES input I'll have to convert from AES to ADAT.
It will probably be more expensive than my gain from SPDIF to AES? :)
I do apologize, but I think I am confused... and I am pretty sure you don't want to convert from ADAT to AES, but I'm not positive, so let's quickly review...
Your Tascam FW-1884 has two optical ports that can be used for either ADAT Lightpipe (8 channels, up to 24 bit wordlength, up to 48 kHz sample rate) and two coaxial (RCA Style) ports for S/P-DIF.
Your new POD HD Pro (and I am a little envious, I have a POD XT Pro) has both AES/EBU inputs and outputs on an XLR connectors, and S/P-DIF inputs and outputs on coaxial connectors.
If that's the case, then your best bet is to connect the coaxial I/O on the POD to the coaxial I/O on the FW-1884.
There is no advantage to converting to ADAT, nor is there any advantage to converting to optical S/P-DIF. And while you could convert AES to S/P-DIF with little or no penalty, there is no advantage to that either.
If you are already using the S/P-DIF coaxial connectors on the FW-1884 for some other device then that does make things a little more complicated. In which case, I'd convert the AES signal on the POD to S/P-DIF.
Does that make sense?
If you'd like a little more information about AES and S/P-DIF then check out this little
application note from our friends at Frontier Design Group. Barry says it better than I ever could!