Originally Posted by BGLeduc
I can play any channel, with or without sub? That sounds like it may be useful for setting subwoofer phase.
With the current ARC and the STR electronics you can definitely do that when you instruct ARC to do Quick Measure incorporating the most recently Uploaded ARC solution. This is for the app running on Windows -- not the phone app.
I don't recall for certain, but I don't believe you have this choice to include the Sub if you tell Quick Measure to show you the raw output of a speaker (no ARC included).
At this point, too, what the new ARC will allow is anybody's guess.
And yes, this is good for checking and correcting Phase between a single Sub and any given main speaker. However it's not so useful for checking Phase between separate Subs themselves, or between a set of multiple Subs and a main speaker. This is because the ARC solution has been built listening to the combined output of the set of Subs at their current Phase settings. If you start changing Phase for any of then, that alters the combined output of the Subs and starts to invalidate the ARC solution. At the very least you would need to rebuild the ARC solution after doing such fiddling with multiple Subs.
Also note that Quick Measure gives you a live, frequency response chart as opposed to a combined reading such as you'd get with an SPL meter. And of course it only shows the result from one mic location at a time. So if you start adjusting Phase -- even with just a single Sub -- in an effort to smooth out the response curve, you may end up with LOWER overall output. I.e., less energy than an SPL meter would show, due to the frequency variation of what a Phase control does. Whether that sounds better depends on what the Phase adjustment is changing. And as with the current Quick Measure, the result shown with ARC included is a lot bumpier than the average across all mic positions shown in the normal ARC results charts. So it is also trickier to determine by eye whether the chart after a Phase change is actually better, too, not even accounting for the fact that the result will almost certainly change if you then look at a different mic position.
The result will also be different if you adjust Phase by setting "Acoustic distance" for the Sub(s) -- i.e., telling the electronics the Sub is positioned farther away than its actual location -- instead of adjusting a Phase control, again because of the frequency variation between these two methods.
One thing I HAVE found this useful for (again, with the STR electronics at this point) is to get an easy check whether Polarity is better set to Normal or Inverted on the Sub.
All in all, it's another useful tool, but doesn't make correcting Phase for the Sub(s) a snap by any means.