Originally Posted by ShaharT
So this is one part I'm still uninformed about. I did get Omnimic, but not sure what's next
When you professionals run REW, what are you trying to achieve? To use PEQ to 'smooth' things for each of your speakers, following which you take out the Trinnov mic and re-run the optimizer? How much of a difference does this get? Did you try switching between presets that you've used this approach, vs. just letting the Optimizer do its magic preset, and had clear sonic differences?
Do you do this measurement process for each of your speakers and Subs?
Considering 7.2.14 this seems like a huge investment, but I'm anyway in lock-down mode, and happy to try and squeeze any ounce of improvement from my system
Chuck has professional experience in his career and does some calibrations for hire in his retirement - I'm just a more hands-on hobbyist. So I'll speak just for myself on how I use PEQ. I'll warn you that you're getting into the rabbit hole. My answers are simplifications of a process, and there's a whole group of REW users that discuss that software ad nauseum on AVS. Less so for Omnimic but it's easier to use.
For me, I use PEQ three ways:
1) To add filters, typically with either REW's Auto EQ settings or ideally Multi-Sub Optimization, to improve the smoothness of the frequency response for the combined sub response. You use this alongside the tools of the Altitude to make the Trinnov Optimizer's job easier, as the Q filters can have higher resolution for fine adjustment in the very low bass than the more general octave smoothing setting for the IIR region. That's an advanced setting; if you're just using the Optimizer wizard, it's even more the case as it has default settings for the octave smoothing/energy correction.
You verify the impact by measuring the before/after response in REW or similar software (e.g .Omnimic) at the critical MLP seat as well as for other critical seats. The goal at a minimum is seat to seat consistency if you have more than one seat. So you might go through iterations of sub placement, PEQ changes, assessment, and possibly rewind to see if you can do better. This also includes the level setting for individual subs and delay, which is a separate subject to itself.The expert pros (e.g. Adam Pelz or Curt Hoyt) might spend most of one day, at least, getting the performance to be "right" as much as possible, and have other metrics based on critical listening they use to shape the sound.
2) After the calibration, I measure my speakers and the sub response (at this point, the combined speaker response) and run REW to check that the levels set by the Optimizer match up and tweak as needed. If you then look at pairs of speakers (e.g. L/R, or center vs. L or R) and see some minor but audible discrepancies in the frequency response due to room characteristics, and the tweaks are minor (+/- a few db) but can audible, you can use PEQ to try to impact that or the FIR curve editor at the speaker level. Changes to PEQ would be made on top of the filters you have in place for the acoustic correction. So you would want to have a base PEQ file with the adjustments you made before acoustic correction saved to be re-loaded as needed before new calibrations, but the changes here supplement the base settings and should NOT be in place before running the new calibration.
3) Some people use a technique called "Bass EQ" to tweak individual films for specific settings to bring out lower (especially ULF) bass. A whole thread exists on AVS with the filters to be added. These settings could be entered in with PEQ and saved on a case by case basis, to be loaded as needed on top of the PEQ settings in 1) and 2).
These aren't things to do lightly, so if you're just working with the Configuration Wizard, you'd be best served by working with a pro or Trinnov support to at least get you through the calibration process with PEQ first before you try yourself. And always do any changes carefully, step by step, to make sure they're appropriate for your HT. Having a baseline preset and one or more presets that document the changes you make is also highly recommended.
I know this sounds like a lot of work, and it is. However, if you reach the level of response you want, it's rewarding. But be prepared to invest time that you could spend watching the Zappa nightly music concert shows that have been broadcast during the lockdown where you are
. I know some of that music from trips to your country, and we watched in my HT thanks to Apple TV and Facebook having the saved videos...next best thing to being there....