No. Peaks & dips in the frequency response don't affect delays like they do levels, so distances can be set before or after equalization.

Peaks and dips may not effect time alignment but changes in time alignment will show on waterfall plots generated by REW.

How will delaying a signal change its waterfall plot?

It is not just one signal. If time alignment is off across multiple sources as we have in theatre systems REW will see it.

You're measuring multiple signals/channels simultaneously? Why would you do that when each channel is EQ'd independently of other channels?

I start one channel at a time then run all together to check interactions.

I start by setting distances and levels then go channel by channel finishing by running all channels.

Each channel gets independent signals, so if you're checking their interaction using the same signal, that doesn't tell you anything about what it will sound like in actual use.

You do understand the concept of multi channel disks? I am not trying to be a smart ass, only asking. For 5.1 you run five seperate channels plus sub of pink noise. Do each channel plus sub seperate then all together.

Do you eq stereo one channel at a time only? If you do then you are going against every stand alone eq manufacturer on the planet.

With a test signal, (e.g. pink noise)...
such as room modes. So far, so good.

...only when watching a movie or listening music
Checking "their interaction" (or correctly) the final calibrating, is not supposed to "tell you" what your system will sound like in actual use.
If your system's "interaction" has balanced tone and all channels (2, 5, 6, 7, or 8) are wired w/ matching polarity*, in theory, the system should not "have a sound." It should be "invisible to your ears."
* incorrectly referred to as in-phase

Examine my signature carefully. You will see a very complex system. Tri-amped LCR channels & dedicated surround L&R channel subs not to mention an LFE/sub. I used the same thought process as SteveB to guide me from from a to z. The final steps I use selected tracks from CDs* I've heard thousands of times on many systems over the last 35 years, some costing well up in the 5 figures.
* and certain video passages

Tony

I do it the same way Tony. When I still ran SDA's the procedure was to do each channel separately without the interconnect cable then run both channels together with the cable in place for the final tweaks.