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About Me

Found 10 results

  1. #FutureFi The Clock is Ticking! I see a shift in some areas of our listening systems. There is a growing movement of systems that are mechanically less complex. Speakers Systems such as the KEF LS50, LSX, or the Elac Navis ARB-51 reduce the need for racks of equipment in the listening space. On the other end of the speaker cable, we have single package systems, such as the Naim Unity Atom or the NAD M10. There is a third #FutureFi trend where the speaker system design also includes the ability to help correct for room issues along with the reduction of components. The Pro Audio market might have a partial lead on this, but Home HiFi is following along. There are systems such as the Beolab 90 at the very top end of this spectrum. I have been enjoying the Kii Three System from Kii Audio while I have been concentrating on the things that feed music to the Kii Threes. I have "blissfully ignored" the room and a couple of other items on my looking forward checklist. This week I decided to move the needle on some other parts of systems design. I am also expanding my world a bit on the speaker front to do a subjective listening test of the Dutch and Dutch 8c and then a comparison of them to the Kii Three's. These two speaker systems are designed to present a time coherent wavefront and to dramatically reduce the effects of many room issues by focusing the sound towards the listener. Both speakers are close-set to the front wall of the room, which makes them more family-friendly. They are both have similar goals but with significant differences in approach. For the next month, I will have both speaker systems available to listen and compare. I will start by setting the Kii Three's aside for a while and learn how the Dutch and Dutch 8c feel in the room. I hope that a month is enough time! Both the 8c and the Kii Three's have a single input that is either AES or Balanced. The Kii Control adds other digital inputs and a volume/power control where the 8c Connects to ethernet for speaker system control. I will be using the AES inputs for most of this testing. I have several goals: I want to understand what the Dutch and Dutch 8c means to the home audio user. How does it fit? I want to contrast that against the Kii Threes. The third factor is the BXT modules on the Kii's. The BXT changes the Kii design by presenting the system as a line source rather than a soffit. What does all of this feel like in the room? Then expanding my learning, I will look to implement room correction on both speaker systems. I am not sure where this will go yet, as I have not thoroughly planned it. I am studying REW as a tool to start. Bob ----------------------------------------- Incoming Inspection Unboxing IMG_1014.mov A Visual Comparison Let the listening begin
  2. I quite like the sound of 'Sofa - Wide' - the sound is generally live, fluid, balanced and spacious. My main issue is with 'Sofa - Focused' - it merely acceptable in the sweet spot, but barely listenable everywhere else. What are your impressions? And did you discover any bugs? I did, and I reported them in the past via helpdesk, don't know if I will again: - when I measure positions, there is one or two for which I get no results. There is some error about missing samples, and also the spectrogram of the measurements is flat line. What I do is continue to the next position, and then going back. - During playback, if I switch filter on and off in the VST, JRiver may crash - In 'Sofa - Wide' measurements, on the positions on the picture (i.e. the small circle) is hidden by the man's figure. I know it is there, so I just click where it is supposed to be Nothing is specifically a showstopper (for me at least)
  3. Hi, I wonder if someone could provide a step-by-step guide to achieving room correction using REW and HQ Player. I tried to find a tutorial but the information is scarce and spread all over the web... It's been years since I last used REW to measure the frequency response at the listening spot. I have a mic, REW and I'm ready to go. Thanks, Ricardo
  4. I'm trying to get an audiophile sound when playing remux ripped blu-rays on my computer. Getting the right syntax to make afir work in FFmpeg would be a way. At the moment I follow Bob Stern's advice to try Audio Hijack to capture the audio output of my video player app and put an AU in. Allloy 2 works but I know I can beat simple eQ with my filters REW/RePhase designed for HQP. I can't get iZotope Trash nor Fog convolver to simply convolve my own 2 channels FIR. The simple but mighty old LAconvolver works and beats Alloy 2 yet. However it resamples my filters to 44.1 and I'd like to keep things 24/96 at least. Furthermore, there is a several second lag between image and sound with LAConcolver. I'll try to sync via video player app but would definetely prefer a better performing solution Any suggestion?
  5. I just came across the Dspeaker Anti-mode 2.0. I am intrigued, because it has an USB asynch input and a digital output. So basically it can be used as USB-Spdif converter including room correction. I like this idea. I also like that they are correcting only up to 150 Hz or so. But... Does anyone have experience on how well the usb-spdif conversion part is implemented? How transparent it is? I am a bit worried seeing that it only has a toslink output. I would much prefer a properly implemented XLR or RCA output. Any thoughts? Are there comparable products that take an usb input, do room correction in the digital domain and output either usb or spdif?
  6. Hello I've read a lot about this very interesting theme "RoomModes". One helpful instrument is a calculator like http://www.bobgolds.com/Mode/RoomModes.htm My room has not a rectangular shape the ground plan is more like a L. So what dimesions are essential? Calculators ask only for room length and width? Any thoughts appreciated.
  7. Greetings! I've been reading alot about integer mode on the Mac lately. I tried bitperfect, but it couldn't enable integer mode on a Mountain Lion laptop, but Audirvana did. When I finally got integer mode activated, I noticed an increased bass response almost immediately. I remember turning up the gain on my subwoofer last night, and I was definitely turning it down on the same songs after I got this working. I subsequently read somewhere (i can't remember where) that increased bass response is typical when activating integer mode. I have a umik on the way and my master plan is to run RoomEQ wizard to get some recommended parametric EQ settings, then use the AU ParametricEQ in Audirvana to implement it. I'm trying to find the holes in this plan before I start buying stuff so now I have a couple of questions. I purchased AudioHijack and Bitperfect before I had this all figured out and now it looks like Audirvana will do what I want, but want to be sure before the trial finishes. - Room EQ Wizard doesn't look like it will work in integer mode and I don't think I can use pre-recorded test tones with it. Since its recommended EQ settings will be based on a non-integer-mode measurement, will that incorrectly EQ Audirvana if I use the Audio Unit eq plugin? - I believe AudioUnits is a Core Audio function. If I activate an eq plugin, will that pull Audirvana out of integer mode or out of the iZotope thing? I'm basically trying to decide if I can do this all with software or if I need to get an external EQ.
  8. Greetings! I'm a grad student at MIT, and I'm working with a startup here that's developing a new high-end home stereo system. We're looking for feedback on the latest features of the system, and would love for you to take this quick 5-minute survey. I'm happy to answer any questions you have about the survey or the technology we're developing, so do don't hesitate to ask! https://dsc4026.sawtoothsoftware.com/xYXqPLYNTC/cgi-bin/ciwweb.pl?studyname=xYXqPLYNTC -Ben
  9. Two things (in addition to bodily parts) that nobody is allowed to touch in my house: My bikes My speakers Well, yesterday I noticed one of the speakers had been moved. I knew I heard something was wrong, but it was easily confirmed from the pattern on the wooden floor. My wife (I haven't yet had a chance to fill out the divorce paperwork) gloated that she had moved the speaker a tiny amount two weeks previously while cleaning (as if), and that it had taken me this long to notice. Never-mind that in that timespan we had a few other things going on, like the Rel subwoofer flaming out, the car's transmission flaming out, and other demands. The cleaning excuse seemed implausible. If ever I need to hide something from my wife, I just put it in the vacuum cleaner. Not to mention the mountains of dog hair. The house is a perpetual standoff, and I usually flinch first and do the cleaning. So I think she moved it just to fuck with me, which, after age 50, has taken the place of ... well, never-mind. She seems to think it is funny that I re-allign the speakers with a laser measuring device. Now I have to re-callibrate the room correction. At least she hasn't questioned why I had the back-up subwoofer stashed in the garage.
  10. Hello, The system: MacMini with Audirvana DAC LessLoss 2004 Pre-amp Nagra PL-L Power monoblocks Nagra MPA Speakers Vivid Audio V1.5 Subwoofer JL-Audio F112 (with dedicated power line) The problem: Even though these are all high-end components with an amazing resolution and a sound I love, I'm fighting with the fact that the system's performance is being very limited by my current living room. I tried several full range speakers and they all had serious bass problems. Apparently my living room is the culprit. So I decided to go for a pair of monitors and a good subwoofer with room calibration. That kind of made it bearable to listen to music there. But still... my system doesn't sound relaxed. Thanks to the subwoofer my main problem is now with the higher frequencies. I find that when I start raising the volume, the music quickly becomes tiring and confusing. So I end up avoiding music with lots of dynamics or feel tempted to start lowering the volume. But this is not acceptable for me. An acoustics specialist went to my home and after measuring the living room, said its proportions are very bad for listening to music. He said the first thing to take care of were the first reflections but I have a window on one side and a sliding door on the other, both right where treatment should be applied, which makes it a hard case. Still, he said I should install diffusion panels on the back wall and on the ceiling. I'm very reticent to invest so much money into something which will have a serious aesthetics impact and without the possibility of testing it. The salesman is suggesting that I buy Amarra iRC saying it probably solves a good part of my problems. But not only I'm fond to Audirvana, I also don't like the idea of being stuck to Amarra. And then I heard about Dirac Live. The questions: 1. How much of this will Dirac be able to solve? Will it reduce the impact of first reflections for example? 2. Won't the Dirac algorithm reduce the quality of the result (detail, etc), since it's transforming the information? 3. Would it still be advisable to put diffusion in the back wall for example? (I consider putting it in the back wall, but I really would like to avoid installing it in the ceiling, even though I hear it's much more important there) 4. Will Dirac Live (2 channels) work fine even though I have a subwoofer or will I need the full version because of it? 5. How will Dirac's room correction relate to the subwoofer's room correction? Should I turn of the subwoofer's room correction? Thanks in advance! Nuno
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