SPDIF straight into macbook pro/logic?

I've been trying to run an effects unit with spdif out into logic on and off for some time now, with no success. I had been using a firepod, which theoretically has spdif ins, but i was never able to get audio into logic with that method.
Is there a way to get spdif data directly into my macbook pro and bypass the audio interface entirely? (I'm a little new to digital audio recording stuff.) I'm going to be returning the firepod to it's owner soon anyway and picking up an apogee duet...which as I understand does not have SPDIF inputs.
The piece of gear I'm trying to interface with is the fractal audio ax-fx. I believe it needs to be the master on the spdif clock and only outputs at 48kHz.
Any ideas?
Thanks!

chorleyman wrote:
Oh, OK, I stand corrected Pancenter - I had no trouble doing what I did with it and I have s/pdif connections on domestic equipment (TV/hifi) that require nothing more than plugging them together! Presumably the toggle in the Firebox/Firepod control panel provides the necessary clock sync but, as I stated, I don't know how the digital in/out on the MBP works (I was hoping someone like yourself would clarify!).
CM,
You may have been in luck and the digital clocks were so close together that you didn't suffer any noticeable artifacts, either that or your units auto-synced. If the digital clocks on both units are very close to the same frequency digital noise can be minimal, still, the audio has lost some integrity.
Let's say this is taking place at 48kHz, unfortunately each unit's digital clock is not exactly 48kHz. One of the most noticeable artifacts is a slight ticking noise, another will be a small pop, tick, or sizzle that occurs randomly.
The Master device is almost always the device sending the digital signal, the receiving device is set to external clock and runs off the clock signal embedded in the s/pdif, ADAT or Optical stream. The other way to do it is using a Word Clock generator so that all studio devices sync to the same clock. That's usually the best option as it's the most stable, jitter free method of sync.
pancenter-

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