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I posted this in the SHD Series forum a few days ago and over 30 views but no one's yet replied. Hoping someone might chime in here in the Dirac Series forum.

Well it's been almost a year since I've done my last room tests, and at that time running (and still) Mac Monterey, there were issues with Dirac Live that I know have been fixed. So, just upgraded SHD plugin software and firmware to latest as well as latest Dirac Live. And now have a second sub, so, I'm pretty excited to see the better results I should be able to acheive.

I've been rereading the SHD and Dirac manuals, and highlighting and underlining various things in the manual. I was hoping someone could clarify one thing before I start. In the main miniDSP article following the steps here:  www.minidsp.com/applications/subwoofer-t.../sub-integration-rew  in order, to first flatten the EQ response of the stereo subs with REW, then adding a crossover, set the time delay between subs and mains. And once everything is set up correctly between the left and right channels (essentially creating a basic stereo 2.2 system in SHD where channel 1 and 3 are the left and right satellites, and channels 2 and 4 are the left and right sub) to run Dirac Live sweeps. 

However, should I ignore what is mentioned here in this article  www.minidsp.com/applications/rew/speaker-time-alignment   of establishing "time alignment" between my left and right channel with REW? (btw, the stereo subs are placed in stereo alignment with L&R mains) I'm guessing this article is only referring to people NOT using Dirac Live, or to people running a 5.1 (or greater) system? Or should I also be doing my own time alignment in my initial REW steps before running Dirac Live? I know that Dirac Live makes some of it's own time alignment corrections with it's impulse response that it's adding to the equation? I want to make sure I don't do too much with REW and potentially muddle things before running Dirac Live sweeps. 

Thanks in advance.

I’m not sure I get it all, and one link is off line now.
But if ou want to compare your system with Dirac on and off, you should get it as good as possible before calibrating it.
So time align everything as best as you can, if you’re placed in the stereo triangle corner there should be minimal time offset anyway, depending of the room.

I do it by ear with test tracks, it's always been better than using REW time reference. I mean for the full range system, not per driver.
1,2 or even 3 ms can have dramatic effect on the center and the summing. Effect that Dirac would take credit for if you didn't do it before.
And who knows, Dirac might still change it anyway, good way to see an issue in your "pre-tuning".

You want to sort sub integration prior to running Dirac Live, but you don't need to worry about left/right time delays unless you're choosing not to get Dirac Live to correct for this (it's an option but on by default).

Thanks Ultrasonic for the heads up. What you said makes sense to me...that said, it's been so long since doing any room tests, I'm having to thoroughly re-read everything and watch videos on the basics. And, I have a tendency to "over think" things. Is it the impulse response of Dirac Live that determines the time alignment between the left and right channels?

Was it you that had said some time ago that you don't use Dirac Live and get better results with just REW PEQs? I've certainly read a few mixed reports. I've done extensive room treatment with a kind of "dead end" sound proofed area where the speakers live and each sub is dual firing (2 speakers in each cabinet pointing opposite directions) which helps things in low end room nodes.

Thanks grosso. Here's the first link regarding preliminary sub integration prior to running Dirac Live. Hopefully this works: www.minidsp.com/applications/subwoofer-t.../sub-integration-rew