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mitchco

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Everything posted by mitchco

  1. 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
  2. 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.
  3. @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
  4. @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
  5. 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
  6. 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
  7. 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
  8. Hi @DistantQ please reach out to D&D support for that question as I could not say.
  9. Hi @ecwl cool! Wrt Room Shaper and how it works, I think it best left to Thierry @fresponse to answer.
  10. 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!
  11. 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
  12. 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
  13. Here is a loopback sweep through JRiver of Dirac's correction filter used in this article on top. On bottom is another DSP product using a FIR correction filter for the same speaker (both left channel). I drew a red line just above the FIR correction filter as I know that is 0 dBFS as I can inspect the FIR filter directly and measure it's peak amplitude in another application. As I can't inspect the Dirac correction filter directly, or know what is going on in the DiracLiveProcessor (i.e. is it "just" a convolution engine or is there additional processing?) it is diffi
  14. I did not say they anything about deep bass, I said no bass :-) I had a pair of LS50's and agreed, above 125 Hz awesome, below that not so much. As @asdf1000pointed out, the KEF R3 or for a driver, the Purifi PTT6.5 that I reviewed: https://audiophilestyle.com/ca/reviews/purifi-ptt65-woofer-and-1et400a-amplifier-technology-review-r866/ Has real bass output to 32 Hz in a bookshelf package.
  15. Very nice! But I see they suffer the same fate as the LS 50's with no bass response. Bass is already shelved 5 dB down from 125 Hz on down relative to the rest of the response and drops like a rock at 40 Hz. I had the LS 50's and really wanted to like these speakers as no doubt they have excellent sonic qualities, but the lack of bass response drove me to sell them. I even tried them with smaller subwoofers (12" inch Rythmik subs), but the discontinuity between the subs and the 5" or whatever midrange driver was too much... What these speakers need is the addition of a real woofer!
  16. @nocrapmanI now right! There is some serious tech packed into these bad boys with 100w per channel. Enjoy! @TooSteepYes, I remember. Way too many things going on, but these cool DSP speakers are up next for an article sometime early in the New Year time permitting. As far as connections, I solder my own cables but all you need is RCA to 1/4" phone plugs as a cable or using adaptors on one end. The MTM's have a +4dBu / -10dBV input sensitivity button on the back of the monitor, so one of the settings with work no problem. The monitors are designed with work with both pro
  17. Don't forget to register to download and run the firmware updater. Good luck!
  18. Thanks. On the desk and about 3ft. Make sure to check the dimensions of the speakers you are looking at as some so called "desktops" are huge and won't integrate well at 3 ft. distance. Tweeter needs to be ear height or tilted towards ear height if sitting on desk. The issue with "desktop" speakers at 3ft distance is the size of the speaker that can properly integrate between woofer and tweeter at the short distance and then there is the limited bass response. While I love the Genelec's and Neumann's the issue (I had) is very limited bass response and almost certainly requires a s
  19. @nocrapman I must have missed this, are these to actually sit on your desk or on stands behind our desk? Or put another way, what is the approximate distance between your listening position and where the speakers are intended to be? Desk against a wall or open to a room? Pics?
  20. [email protected] good! I bet sounds good ;-) No LFE for me. Best to XO in-between room modes if you can...
  21. @nocrapman desktop speakers that sit on the desk or desktop speakers that sit on stands behind the desk? Distance between the speakers and your ears sitting at the desk? Indeed this is a tough category as bass response is typically the big issue. 8" woofers will give you the bass, but need to be put on stands behind the desk and far enough back for the woofer and tweeter to properly integrate. Smaller speakers on the desk need to be either at ear height or sitting on the desk angled up towards your ears. But may lack bass response. Digital Room Correction (DRC) can make
  22. Love the Rythmik subs. I have a pair of F18's. Fantastic transient response. Mine are time aligned with the mains. Depending on size of your room, there are models that have more output like FV18 or FV25HP. One of the few sub manufacturers that publishes meaningful specifications, backed up by 3rd party independent measurements.
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