Yea I want to use the physical coax or opticals for the loop. Right now I'm just using a SRC FX 0/1 to a K2lt. I don't see anything anywhere that would allow me to specify SPDIF OUT in the DSP, not even the epiloglt. It's been awhile since I toyed with the DSP, but I never used SPDIF in the past so it's new to me. EDIT: I guess I could try it internal first anyways, but think ultimately I need to use the physical connections. btw, thanks for workin this with me some maddog, even if it doesn't end up working it's nice to have someone to bounce ideas off of.