Originally Posted by ss9001
I've found the FIR (looks like it works like another target curve), User (GEQ) & Preset EQ (GEQ) settings on the Output tab, so at least that's a step forward since I haven't gotten that far in the Journey and didn't know they were there! Now I do.
Yep, that's it. It was one of the first features I noticed on the Optimizer when I spent several hours at a friend's house, in two-channel listening (+subs). The on-the-fly flexibility, and ability to adjust to taste on music was the #1
thing that motivated me to go from the R-972 to the full featured Trinnov processing as soon as I could. Then the Altitude came along and the rest was history...just remember, this is on top (after) the Optimizer's acoustic corrections and any PEQ that you have enabled prior to running to Optimizer as part of the room EQ process.
In general, how do you decide to use one and which one to use? All based on post-Optimizer room measurements, or do you adjust on-the-fly like an old graphic EQ? If you're using these FIR EQ adjustments as temporary tweaks, I assume they don't get saved to the preset but to a file. Correct? I do see the place where you save & load them.
Depends. I used FIR for the results from room measurement to identify tweaks to the target curve's measured results on a channel by channel basis, so I could quickly A/B changes in content (saving my settings in a file, i.e. "October 30th tweaks v2.0"). I have a preset where it's automatically loaded and I can A/B vs. the most recent full room EQ I had The FIR-based EQ can be quicker than recalculating all the filters as you can, say, raise 400 Hz up +3db for the center speaker and just run that change rather than waiting for the full 13.4.6 to rerun. There's no IIR filter at work on the Output tab, so it's something you'd use above the transition frequency, where IIR isn't (typically set to) having an impact.
For more subtle changes to match how you hear music, such as slightly honky singers or a dull midrange on a specific recording, I usually do the GEQ if I just want to hear something quickly, or bring out the tablet pen and go to the FIR EQ. The graphic EQ is a little cruder and easier to work with for the listed frequencies, but IMO the FIR is more precision and yet harder to get right. As for rolled off bass on some music, that's more of a separate target curve setting as you can use IIR for subs there as well as FIR/IIR for mains in the bass range, so it's more powerful.
It's a bit of a tradeoff to do well IMO with post-calibration tweaks with the FIR/GEQ, but it's really a personal preference thing. If I had a pre-engineered room and had the HAA education when I did the entire room, maybe I'd do less tweaking, however, as some of what we think needs to be changed might be more symptoms of subtle room issues that could be better addressed upfront. Regardless, it's fun to just pull out the iPad and play with some cut for DIY "remastering".
I need to get out the manual again. Your post reinforces how powerful the Altitude is and all the tools at one's disposal - just need to learn why &
how to use them.
Fun for the whole family. LOL.