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Everything posted by 3ll3d00d

  1. I would think he's using an appropriate FIR filter to deal with that, at least that's how I handle it
  2. I would have thought the local environment is a major contributing factor here. I can't realistically use all of the capability I have in the house because I live in a densely populated city, have neighbours who I respect (and who haven't minded on the occasions when it does get somewhat feisty in here!) and have ears I don't want to damage further (tinnitus which I would assume is derived from years of standing too close to PA speakers in clubs). Normal viewing levels for me are ~ -10 (bass has a ~4-5dB rise by the bottom end), -5 probably about as loud as it ever goes for normal film viewing). No idea what that equates to on the scale referenced in the original post.
  3. I get the reason why you want to push the XO lower, it's a good reason for sure. I'm just saying it might be a risky strategy and that dynamically compressing the content to deal with it is not, IMV, a good trade off. I'm not saying what you're doing won't work btw or that it's an inherently bad idea, testing (using your ears) is the best and quickest way to verify. FWIW I have found there are a few tracks from Adele 21 to be perfect for stress testing this aspect of a crossover, she can really belt it out and her voice has a broad range (which you can see if you watch a live spectrum analyser alongside listening).
  4. I don't understand why you'd want to design something that requires you to deliberately introduce distortion in a critical part of the frequency range, it seems completely contrary to some of your goals too. At what distance will you listening btw? FWIW I made a speaker recently for which the 1st iteration of the crossover pushed the tweeter too low, I found this introduced a harshness/roughness that was really obvious with certain content even at lower levels. It was quite unpleasant, almost unlistenable in fact, but only on that specific content. I didn't think I'd even pushed it that far beyond and the measurements didn't look bad but it was still rough (this was roughly an LR6 at 1500Hz vs an LR4 at 1900Hz). Different speaker obviously so ymmv.
  5. A 1500 crossover sounds optimistic to me. Have you looked at http://medleysmusings.com/scan-speak-illuminator-d3004602000-tweeter-testing/ ?
  6. 1st half of http://www.aes-media.org/sections/pnw/ppt/jj/room_correction.pptis a good summary, comes from http://www.aes-media.org/sections/pnw/pnwrecaps/2008/jj_jan08/ Actually there was a post on this subject in the last day or so comparing the various target curves (b&k, ITU-R BS.1116-3, EBU 3276, the harmon/olive paper from 2010 & the toole paper from 2015) and they're all v similar. The specs (EBU/ITU) go into more detail on the room & speaker parameters, I don't recall whether the B&K & the Harmon papers gave specific guidance on that point though. In 1994 (updated in 2015), the ITU produced a "Recommendation ITU-R BS.1116-3
  7. Interesting point. I guess you could build your own to get a known rolloff - for instance http://sound.westhost.com/project96.htm Perhaps I just don't have enough subs to care too much about a few dB here or there at ulf as I find my subjective preference is more important. Mind you there is also the question of whether a better microphone gives audibly better results at high frequencies (for full range correction) which, if such a mic also has more extended lf response, is another aspect to consider.
  8. there is a pic in http://www.hometheatershack.com/forums/rew-forum/147730-soundcard-calibration-sanity-check.html
  9. @lukeamdman if you get a chance, could you run a sweep to measure the loopback and show the IR pls. I'm just curious if they've fixed the HF ripple seen in the gen 1 interface.
  10. which rolloff are you attempting to counteract there? that of the phantom power supply?
  11. Your mixer looks like you are sending a mix to the monitor output, the daw channel output is cut off the bottom of the pic though so not sure where that is going. Perhaps you can confirm? I suggest you switch to direct playback and repeat your test anyway.
  12. actually now I see this is for the 2nd gen scarlett interfaces, is that what you have? mine is a 1st gen
  13. interesting, I didn't realise they had a new mixer app out (I'm still using mixcontrol).
  14. your line in-out loopback looks like a mic input here's my 6i6 cyan is line out to mic in (front combo jack) red is line out to line in (rear TRS) purple is line out to inst in (front combo jack) the other measurements look like some sort of feedback. Can you show a pic of mixcontrol?
  15. I would say your choices, for video playback, are; jriver as the source or normal consumer equipment as the source + some opendrc model OR a PC running as a custom audio processor fed by an appropriate set of pro audio interfaces
  16. There are a few options for generating/designing FIR filters I do use acourate generated filters in jriver, there is a cutdown version that runs on opendrc hardware some others (like mojave) use audiolense rephase is a free option, this one is a largely manual filter designer I came across http://aplaudio.com/conc2/products/tda-eq/ recently, no idea if it's any good I have a motu now (the 1248) as well as the PSU on my RME died. The motu mixer app is served by the hardware via a built in web server so is accessible via any device on the network (assuming you have a network cable plugged into it of course). I don't think there are many options outside of a PC or a minidsp for running arbitrary FIR filters though. You can get devices like a DEQX but they're 1) expensive, and 2) often limited to a preselected set of steep crossover slopes. Does the OpenDRC have the same issues as the 10x10? It's a different hardware platform after all.
  17. What is the h direction? what in that plot tells you the peak is the ceiling or the floor?
  18. Yes I know, there is certainly a difference in the measured result when you do mic input vs line input. However I said "on that test" in my post for a reason he uses a loopback from line output to line input and that's what I am describing in my post. So if 2dB at 5Hz vs 0.5dB at 5Hz is important to you then I recommend verifying your own signal chain with your actual equipment.
  19. I would repeat that loopback with your device to be sure. I have a 6i6 and it is 2dB down at 5Hz and about 7dB at 2Hz on that test, different device of course so it may behave differently or they may have revised firmware/hardware along the way.
  20. What do you mean by that exactly? The difference between the transient leading edge of a signal vs steady state or something else?
  21. it is described in the link in my earlier post http://www.avsforum.com/forum/113-subwoofers-bass-transducers/1333462-new-master-list-bass-movies-frequency-charts-post23468771.html#post23468771
  22. You have to respect the differing digital signal levels in the lfe channel vs the other channels. Just summing them doesn't deal with this.
  23. jriver as per http://www.avsforum.com/forum/113-subwoofers-bass-transducers/1333462-new-master-list-bass-movies-frequency-charts-post23468771.html#post23468771
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