I assume this is a digital connection? SPDIF perhaps? If so, do you have your clock source set to external (the tascam)?

I am using a TDIF from the tascam and I have tried changing word length and sample rate. I can lower the amount of clicks, but they are still there. Any Ideas???

I haven't used the Aardvark card, but ther esound be someplace where you can change the master clock source from internal to external. If the aardvark isn't using the tascam's clock, there will be pops. This has nothing to do with sample rate and bit depth.

The sound is similar to that of an old record. Is that the result of the card and the desk not using the same clock? The sound only comes with signal going through.

Sounds like it to me. Look for the setting I mentioned.

I am at my wits end. I have exhausted the aardvark manager options and can only change the clock manually, but it automatically detects changes so it must be automatic. Can anyone tell me what "Emphasis" means. It says TDIF emphasis. Should this be clicked on in the manager? I can adjust the buffers so that the clicks are reduced, but I can't get rid of them. The problem could be the Aardvark card or it could be the Tascam TM-D1000. I just can't get rid of the little clicks. Any advice????