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3ll3d00d

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Everything posted by 3ll3d00d

  1. 3ll3d00d
    ah right, yes I see what you mean red is, I think, the sum of your LFE filter cyan is using 2 LS with Q=0.707 plus 2 peaking filters; 1 at 17Hz, Q=1.5 and gain +5 & the other 12Hz Q=1.5 and gain +1 blue is cyan + another peaking filter at 35Hz, Q=1.5, gain -0.8 I don't think I'd recommend using that 19Hz peaking filter with the jriver shelf filter, it results in a fairly prominent notch in the shelf
  2. 3ll3d00d
    All of these are entered via the PEQ block in DSP studio. Note that if the PEQ block is before room correction then subwoofer means the LFE input channel, if the PEQ block is after room correction then subwoofer means the physical subwoofer output channel. You want the PEQ block to be *before* room correction. 1. Gain -4dB Click add/adjust volume Enter -4 Select subwoofer from the channel dropdown 2. Low Shelf 15Hz, Q of 0.94, +6dB 3. Low Shelf 15Hz, Q of 0.94, +6dB As per the previous post, this is not directly supported in jriver so you have to approximate. Click add/adjust low frequencies (low shelf filter) Enter frequency 15 Bandwidth 1 Gain 6 Select subwoofer from the channel dropdown Repeat 4. Peak 19Hz, Q of 2, +6dB Click add/adjust low frequencies (low shelf filter) Enter frequency 19 Bandwidth 2 Gain 6 Select subwoofer from the channel dropdown You can now just repeat the same procedure for the next block, just choose the relevant LCR channels from the channel dropdown instead of subwoofer. EDIT: see next post, the filters might need fine tuning for use with jriver.
  3. 3ll3d00d
    This is a v steep LS that has some overshoot at the top and bottom of the shelf isn't it? I guess this is because you wanted a steeper rise from the shelf? A low shelf with this Q is not supported directly by jriver. It's low shelf is described in terms of Q but, as I understand it, it really mean S (shelf factor) and it limits this to a max of 1. The formula to convert Q to S is listed in http://www.musicdsp.org/files/Audio-EQ-Cookbook.txtand is 1/Q = sqrt((A + 1/A)*(1/S - 1) + 2) where A = 10^(dBgain/40) If you solve for S you get 1/((((1/Q)^2-2)/(A+1/A))+1) which means you'd need jriver to accept a value of ~1.7 for the LS If you go with a shelf with a S of 1 (roughly a Q of 0.707 in the minidsp terms) and increase the gain to 6.2dB then you get the following; black is your version, brown is what jriver can support. I suppose this is close enough?
  4. 3ll3d00d
    I use Jriver and have applied these sorts of filters before. You just add them to the peq block in the DSP window. I can lost an example later.
  5. 3ll3d00d
    they are already there aren't they? http://www.speakerpower.net/order.html there is also http://www.speakerpower.net/dealers.html(I got mine from seaton)
  6. 3ll3d00d
    Probably worth following that up in http://data-bass.ipbhost.com/index.php?/topic/19-speclab-waterfall-scene-capture-tutorial/
  7. 3ll3d00d
    you don't need the DTS decoder no, at least not if using a recent jriver as that's supported by LAV now. you do need to be able to read BDs yes, I use anydvdhd.
  8. 3ll3d00d
    post 8835 in http://www.avsforum.com/forum/113-subwoofers-bass-transducers/1333462-new-master-list-bass-movies-frequency-charts-295.html#post23468771 it is page 221 of 566 for me but avs forum software is rubbish so working out a direct link is always tricky, the above is using the default no of posts per page
  9. 3ll3d00d
    no you don't, you can do it direct from the disc or from a BD rip.
  10. 3ll3d00d
    I'm not sure I'd call that commentary a "review"
  11. 3ll3d00d
    go to File/Audio Files & Streams/ Analyse and Play File (with DSP) and choose the wav from the file dialog remember to switch your mic cal filter to bypass
  12. 3ll3d00d
    One way is to use jriver to convert the track to a mono wav and then play that through speclab.
  13. 3ll3d00d
    The method for calculating the composite rating is in http://data-bass.ipbhost.com/index.php?/topic/12-the-low-frequency-content-thread-films-games-music-etc/?p=86I would think the difference will be that the composite rating considers the whole film not just the most aggressive scenes. I don't see that there would be any difference between a actual voltage based reading and one based on dBFS as long as both are clean and you use an equivalent reference for the max signal.
  14. 3ll3d00d
    I verified it for Q of 1,2,3 and they look the same to me. The spreadsheet has a rather low resolution for higher Qs but it still looks accurate to me. I tested Qs 1,2,3,4,5,10 with +10dB gain at 60Hz, graph attached. I can share the mdat if anyone wants it.
  15. 3ll3d00d
    FWIW I bought mine from seatonsound, it was both cheaper and ships with http://www.neutrik.com/en/audio/powercon/powercon-32-a/nac3fc-hc on the end of the power cable. EDIT: actually now I reread my emails I see he said it normally comes with the powercon but he includes a terminated power cable, not clear from the above whether the connector is the problem or the cable. I suppose not such a big deal for us in the UK anyway.
  16. 3ll3d00d
    is BEQ for Tron Legacy available? (you can guess who got this for xmas!)
  17. 3ll3d00d
    No I didn't, I don't think my current sub could have managed that.
  18. 3ll3d00d
    I mean midrange, it just didn't seem v dynamic. Thinking about it, this could just be the change in spectral balance as the mains are both absolutely and relatively quieter.
  19. 3ll3d00d
    I watched all of PR with the BEQ engaged and my house curve tonight, just a massive difference, quite mental bass. Really nice job done there. I think the mid range was quite bad though, not sure whether that is the track itself being a bit crap or the effect of applying such a strong boost to the low end. I have my new sub turning up in the next week (2 * uxl 18) so will have to give it another go once that arrives. I guess I need to get Godzilla now too. Keep up the good work anyway!
  20. 3ll3d00d
    I'd forgotten about this thread - http://www.avsforum.com/forum/113-subwoofers-bass-transducers/1487271-spectrum-labs-different-slope-than-room-subwoofer-frequency-sweeps.html - which goes round the houses on this subject & seems somewhat inconclusive in the end.
  21. 3ll3d00d
    I took a look at an assortment of PvA graphs from the various films in the google docs spreadsheet and they invariably have the same pattern, a 10dB (+/- 5dB ish) rise from ~130Hz to 30-40Hz. This is a pretty good description of the shape of the typical house curve, if not a bit stronger than that. The Q to my mind is whether that house curve is actually embedded at mix time as opposed to needing to be added at home?
  22. 3ll3d00d
    I don't know how useful this feedback will be but I definitely concur with that "you know it right away comment". I only listened to that opening battle and it does indeed completely change the experience. In my room there is a fairly constant low level tactile sensation while the jaegar is strutting around and then some serious impact when things get going. One question though, do you run a house curve on top of this or is that baked into those settings?
  23. 3ll3d00d
    Are you using jriver 20? If so, you can assign a DSP config to a specific track now so no need for zone switch for this.
  24. 3ll3d00d
    there is something that vibrates like crazy in my room at ~30Hz and so is lit up by that scene, it makes my head feel like it's buzzing which is quite an odd sensation! it's the scene where it does a barrel role & the propeller blade comes off the one engine slamming into the side of the plane. I've never seen the rest of the film tbh so not sure if there are other bits like that.
  25. 3ll3d00d
    I don't know exactly. I googled a bit more on this subject and it seems like it is more involved than I thought, for example http://www.diyaudio.com/forums/everything-else/127882-how-protect-sound-card-during-amp-measurements.html, so basically some sort of resistor network to provide a load to the amp and divide the voltage down to a reasonably level & then possible ground issues to deal with.
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