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About mitchco

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  1. @Yourmando thanks for your comments. I have performed this myself, using the same anechoic data, and my tests show that it does not improve the end result. Of course, if one is not using room correction eq, it helps. SOTA DRC/DSP, that is correctly applied, not only alleviates the need for anechoic speaker eq, but can be applied at a much finer resolution than a few PEQ filters can do. I.e. the response tracks closer to the ideal minimum phase response. In addition, the left and right channels have virtually identical frequency response which means the phantom stereo i
  2. Hi @dm68thanks! I don't know if David @Focus Fidelity has that feature in the export filters yet... In the interim, an easy way to to split the stereo filter is to use an audio editor like Audacity to open up the stereo filter and select "split stereo track into two mono tracks" like so: https://manual.audacityteam.org/man/splitting_and_joining_stereo_tracks.html Then select the top split track and Export as "other uncompressed file" and in then click options and choose .wav as the header and in encoding choose 32 or 64 bit float (based on the format exported by Focus Fidelity Filter Desi
  3. No worries, checkout: https://audiophilestyle.com/ca/ca-academy/acourate-digital-room-and-loudspeaker-correction-software-walkthrough/ Scroll to the section: Set up to take measurements, see point 3. The other points may be useful even through the rule of thumb for ETC has changed to -10 dB after the direct sound for the first 20ms.
  4. @Matias, that was from 9 years ago :-) As long as you have mic cal files for both 0 and 90 degrees, does not matter too much. Today the recommendation for 2 channel is pointing the mic between the two speakers and for surround pointing the mic up. Cheers, Mitch
  5. @jrobbins50 Yes, AL will work for desktops as well. @Crom The process of designing a custom room correction filter takes some effort and understanding. This is one of the reasons why I write "step by step" articles of walking through the process. If you can follow the steps in the article and arrive with similar results, mission accomplished :-) Focus Fidelity joins a "very" small group of room correction software that can achieve accurate sound reproduction both in the frequency and time domain for just about any loudspeaker and room combo. Kind regards, Mitch
  6. Hi @Confused Yes, Focus Fidelity will work fine for any setup. While I use REW daily for acoustic measurements, it is not marketed or sold as "room correction" software. While one can use it for taming some peaks in a room, it is not at the same resolution as "purpose built" room correction software with it's 65,536 tap length FIR filter. Parametric eq's or PEQ's don't have any excessphase correction capabilities, so it is missing half of the "transfer function" for proper room correction. At low frequencies this translates into the difference between smooth bass versus smooth and
  7. Hi Juergen, good to hear from you. Totally agreed - room correction, properly applied, can make an outstanding difference in sound quality, especially for the price! Kind regards, Mitch
  8. In this article, I walk through the process of using Focus Fidelity’s Digital Room Correction (DRC) Filter Designer software to calibrate my desktop speakers for accurate sound. Focus Fidelity’s Digital Signal Processing (DSP) software product costs US $250. In my opinion, using DSP to correct for any loudspeaker in any room is one of the best audiophile upgrades one can make to their playback system. As we will see, using Focus Fidelity’s Filter Designer makes significant improvements in both the frequency and time domains that are both audible and measurable. Introduction
  9. Hi @DistantQ please reach out to D&D support for that question as I could not say.
  10. Hi @ecwl cool! Wrt Room Shaper and how it works, I think it best left to Thierry @fresponse to answer.
  11. Hi @DistantQawesome and congrats! I believe I placed 4 Vibrapods on the stand which gave airflow for the fan. While the stands can handle the weight, the platform is small and I felt like they were precariously balanced. These are heavy speakers and the big depth makes them a bit awkward to handle. A stand with a larger platform may be a better fit. Enjoy the sound!
  12. Thanks @Cadguy I don't think that would be an issue. Wrt other speakers. Man, far and few between I am afraid. Martijn @mensink and team have designed and manufactured an incredible loudspeaker that checks all the boxes for me. Revel Salon2 is another speaker that has the nice downward sloping treble, but it is not an active speaker and will require room correction below Schroeder. It is also not a constant directivity device and has a wider dispersion characteristic than I tend to favour. But worth having a listen. Other than that, it is a sad state of affairs with overly bright s
  13. Happy New Year Omid! Wow, well I could write a chapter or two about that :-) If I had a passive speaker system, I would just apply room correction and be done with it. The reason being is that the drivers are already hardwired (i.e. designed) with a passive XO and with the tradeoffs between on and of axis response, etc., already baked in. Now if it is was a digital XO system, where you control the XO and each individual driver, that opens the door to making some real system improvements and worth the effort. Reason being, you have full control over all aspects of the X
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