Do you hear any difference?(master clock)

Ok, took another quick look because I was interested in seeing if I could tell if the samples were walking around by lining up a specific sample at the beginning of the track and then seeing if various samples throughout the track were before or after their corresponding samples in the other track.

They were exactly the same points in time. The samples are not walking around.

I did notice that the waveforms in certain sections of the song were much more dynamic, sometimes the peaks and valleys were slightly different in time. The samples were identical in time though, so it's my opinion that the clock is not making the difference in sound here.  It almost has to be some kind of effect/plugin with a non-deterministic processing function that can vary between runs.

Look at the bottom wave form of each track here and you can see around the cursor that the bumps are vastly different:

I may be crazy but I'm hearing about 12 clip changes throughout that compilation.  Am I in the ballpark?

Setting all clocks to internal gives this really strange sound(don't listen loud on headphones): www.dropbox.com/s/yr34pqtal1wdpnl/All%20Internal%20Clocks.wav?dl=0

I'm guessing it has to do with the fact that they are all interconnected with digilink cables and to the Avid HDX card. Still, I could choose one as the master and daisy chain to the others without a master clock if this blind listening test proves me to be crazy about the Mutec haha.

Ah that explains some of it.  The PCM and SPX have pretty terrible converters in them which would explain why we hear a lot of effects when nulling.  Since their converters are probably really jittery, they wouldn't null as closely as a pure track.  More fuel for the idea nulling can only work if it's a pure instrument with no software or hardware based time-altering effects.

I'm guessing that the internal clock on the Lynx is no slouch to begin with... so the difference might not be so profound to switch to an external clock source. I've had great experiences with Cranesong products in the past(as you mentioned the Quantum). Granted this was back in the day of the Digidesign 192's (Circa 2008), but I specifically remember a hip hop mixing session I did on a large SSL 9000J in a large room with Augspergers and just switching from internal to external clock(Cranesong Hedd) was absolutely mind blowing with regard to improved separation, clarity and a seemingly larger stereo field. To be clear, I was still listening to the mix bus on the board (not monitoring through the Cranesong converters or engaging the "tube" processing) and the difference was night and day to everyone in the room, including the artist and members of his entourage. Nowadays, I would hope that internal clocks have gotten better for D/A interfaces in general, but that mix taught me a valuable lesson about the importance of a good clock source when playing back digital audio. I see so many engineers putting tens of thousands of dollars into their summing hardware and buss processing chains to massage every last db of audio that is coming downstream, but their source is a stock Apollo or equivalent A/D D/A interface jammed full of mic preamps, routing options and a plugin processing engine, all clocking to a $7 chip. In the right instances, an external clock will be the most dramatic change you can to improve the quality of your DAW.

Well, I chose the mutec as my fav

I haven't explored it yet, but I am using an Aurora(n) as my interface and 16 i/o for hardware inserts, and tracking sources with more than 2 mics...and a HEDD Quantum (connected via AES) for mixbus, as well as tracking overdubs (up to 2 mics). I have not explored clocking the Aurora(n) off the HEDD Quantum yet, but what I'm gathering from this thread is that there might not be much of a benefit to switching from the internal Aurora clock to the HEDD as master clock. Correct?

I monitor off an Avocet IIA, which does it's own internal clocking and does not have a WC input.
Is the HEDD Quantum running off it's internal clock, even though the Aurora(n) interface is set to internal?
And what might be gained by running a BNC cable and making the HEDD Quantum the master clock for the Aurora(n) in this case?

Thanks!