If you did measurements with Impala then they are already auto-zeroed. Do you guys say that its better to undo that zeroing and perform the calculation? That sounds very strange.
I have also experienced a slight shift to the right for some center voices, so interesting in the solution. A proper DRC should correct that even if one of the speakers plays louder.
No just the opposite…I undid the autozero by misinterpreting what was in the manual and posted here and “created” an off center soundstage panned to the right. So redid the filter and reimported the Impala measurements and didnt touch the autozero function and that fixed the issue…no more soundstage centering problem!
My experience with Focus Fidelity
In summary, I am thrilled with the results.
I first became aware of digital room correction years ago, when miniDSP first came out. It seemed like it would be complicated to set up, and I was not thrilled with the idea of inserting an ADC/signal processor/DAC. I never gave much thought to the idea in the ensuing years. Then, two things happened:
I ordered a UMIK-1 and cheap microphone stand from Amazon and purchased the Focus Fidelity software. I read the manuals and found them a bit confusing. I managed to screw up taking measurements on my first try, and the Impala software hung during my second effort. Everything worked perfectly on my third attempt, so now all I needed to do was to create my filter.
I initially made filters using all of Focus Fidelity’s preset options, thinking I would then try each, choose the one that seemed best and then tweak until I had what I wanted. Fortunately, I realized that this would be a waste of time. All the user-loaded headphone filters in MUSE were modified versions of the Harman curve or some similar generic user preference. I discovered when selecting headphone filters that I preferred a couple of small peaks in the upper treble. So, I used the Focus Fidelity Harman curve and added my tweaks to the upper frequencies and uploaded it to Roon.
When I first tried it, the volume was roughly 15bD lower than without the filter, so I opened the curve in Focus Fidelity, raised the curve by 15dB and tried again. Now, I was in business.
I have a relatively pricey audiophile system that I thought sounded very good, but the differences after applying the filter were dramatic. Instrument timbre was improved to a level that I never thought was possible. My listening room is very large (roughly 25’ wide by 60’ deep) and irregularly shaped, with some large alcoves. I have never had great imaging, largely due to the size and shape of the room. Now I have and wonderful soundstage with very clear separation and imaging.
I am sure I could get some minor improvements by tweaking my current filter, but prefer to spend my free time listening to music instead. I cannot recommend this product more highly.
One other feature I would like from @Focus_Fidelity is to be able to measure with sweeps played externally. There are many situations when this can be good, for me its to be able to measure with a HQPlayer filter in place. Another common scenario is when using a NUC (or Nucleus from Roon) as Roon server.
You would need to have the “chirp” timing sound in place for this, and the ability to export your sweeps as well as listening and waiting for the “chirp” to play before measuring. Maybe even export all three sweeps into one.
+1 from me also, I asked for it a while ago. I have a streaming only dac that has no usb input so I had to go buy a cheap dac to do the measuring
Focus Fidelity is a high value product up there with room treatment if not better. Tried REW and rephase to create convolution filters but could never get the results I get with FF. Really simple to use and my 2.2 system has never sounded this good. Detail and imaging are fantastic. Can’t imagine what an atmos setup calibrated with FF would sound like, only if there was a minidsp or reasonably priced alternative with 13-channels and enough taps per channel. Very happy with FF!!
Hi @Magnus
I might implement this in the future. The procedure would be that Impala generates a 2 channel wav file which you play from Roon or any other media player. The wav files contains an initial timing chirp followed by left channel sweep, right channel sweep and another timing chirp. The last timing chirp being for clock drift correction.
I’m a Roon, HQP and FF user, and this would be a great development for FF
Waiting for this new version 
I’ve been using Focus Fidelity for 16 months. It is worth every cent of the entry price IMHO. It is sophisticated enough for advanced users to tweak the final filter significantly but the default settings will give most people far better sound than they can get from REW/RePhase, etc. I am a reasonably advanced user of DRC and am lucky enough to have a well-treated, dedicated listening room but Focus Fidelity is still an invaluable tool in my DSP armoury. The latest update makes the product even better. No ongoing subscription, either. I heartily recommend it. Kind regards, Peter.