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Post by ansat on Sept 17, 2013 21:31:07 GMT -5
The multi-channel version has peaked my interest. Once I have an XMC-1 I have a feeling the full version will be calling me with a deal I can't refuse. I think that I am in the same boat LC. Given the info presented at emofest, I have my suspicions that the version that will be included with the XMC will be without 2 features that I wish to have control over. The first is the individual curves for each speaker. I think that this will be locked out as it is not needed for dirac to perform the base functionality. The second that I think will be missing is the stadium setting and the single seat setting. I do not know if dirac treats these measurements differently or if it is just for placement or if dirac wants more or less measurements based on the choice of your seating arrangements. Tony
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geebo
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Post by geebo on Sept 17, 2013 21:46:22 GMT -5
What did dirac do to my 51 hz? Taking off the 1/1 smoothing and digging in deep the 50 - 60 hz range of the spl Dirac. The base was 58 db @ 51hz and dirac increased it to 64db. Looking across the whole spl it appears that there is a fixed limit of 6db of gain that dirac is willing to add. Audyssey's max appears to be 8db according to the graph but in many cases audyssey did a lot of attenuating. At 51 hz there was no change to the phase of the speaker along with any other changes that my mic and REW can detect put in place by Dirac. Tony, did you look at both the right and left channel phase plots? I see very little done to the right channel between 20 and 100Hz but quite a bit more in the left channel in the same area.
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Post by ansat on Sept 17, 2013 21:54:46 GMT -5
Geebo, I did not look at both as I was trying to look into the gains that were set by Dirac. But looking at the lefts speakers decay, If Dirac would of increased the 20-100 much the decay would of been crazy. With the shape of my room there is a wall to the left of my speakers (4.5 ft ish.)and the wall to he right is almost 10 ft. If you look at the base left impulse chart vs the base right you can see the difference that wall makes.
Tony
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klinemj
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Post by klinemj on Sept 18, 2013 11:20:19 GMT -5
Tony and George...which mic's are you using? I am gearing up for my trial and my old Behringer mic is not USB so I am looking at options.
Mark
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geebo
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Post by geebo on Sept 18, 2013 11:34:22 GMT -5
Tony and George...which mic's are you using? I am gearing up for my trial and my old Behringer mic is not USB so I am looking at options. Mark I have an Omnimic system and it works fine. But that's a $300 mic and software package. www.parts-express.com/pe/showdetl.cfm?partnumber=390-792FWIW, they were using an Omnimic in the skunkworks room at Emofest. The Dirac software also accepts the Omnimic calibration file. But there are cheaper alternatives out there.
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klinemj
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Post by klinemj on Sept 18, 2013 11:42:31 GMT -5
Cheaper available...true....but suddenly I am thinking "why should I skimp if I am thinking of spending over $900 on a software?"
It's an addiction I tell ya!
Mark
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Post by rogersch on Sept 18, 2013 11:53:53 GMT -5
In the Netherlands you can rent a specific XTZ mic for Dirac. One week for just under 20 euro and return shipping costs...
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Post by ansat on Sept 18, 2013 11:55:23 GMT -5
Cheaper available...true....but suddenly I am thinking "why should I skimp if I am thinking of spending over $900 on a software?" It's an addiction I tell ya! Mark cross-spectrum.com/measurement/calibrated_umm6.htmlTony sorry for the short response. sent from my phone.
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Post by ansat on Sept 18, 2013 11:56:50 GMT -5
Mark, the usb mics have a higher noise floor then the xlr phantom types. Why do you need a usb mic?
Tony
sorry for the short response. sent from my phone.
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geebo
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Post by geebo on Sept 18, 2013 12:00:13 GMT -5
Cheaper available...true....but suddenly I am thinking "why should I skimp if I am thinking of spending over $900 on a software?" It's an addiction I tell ya! Mark Well, you'd be paying for software that you may not be interested in. You can get an equivalent or better mic for less. But if you want to see the actual results of room response then it's a good package. I like it better than REW because of it's ease of use and setup and the fact that you get real time visual feedback of changes you make.
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klinemj
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Post by klinemj on Sept 18, 2013 14:05:11 GMT -5
george...looking closer into it, you have a good point!
tony...you have the one I was looking at. on why USB...don't I need to use a USB input for DIRAC? or, could I put my regular Behringer into the mic input on my computer's mic input for DIRAC?
Mark
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Post by ansat on Sept 18, 2013 14:55:04 GMT -5
Mark I am not sure if it will work or not. But I dont see the difference in a mic with the pre built in vs a mic connected to a pre with usb out. But I have that beringer mic as well I will try to test it tonight
Tony
sorry for the short response. sent from my phone.
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klinemj
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Post by klinemj on Sept 18, 2013 15:29:19 GMT -5
My Behringer preamp does not have a USB out...does yours?
I guess I was thinking that DIRAC required a USB mic input because Mikael mentioned using them and not a regular mic, but it might still work. I sent e-mails to 2 places to check into how much it would cost to get a calibration curve for my Behringer...I have a "Generic" one but not one for my specific mic. I've seen data to indicate there's a big variation so having it calibrated to get a specific curve is a good idea.
Assuming the calibration cost is reasonable (last I knew it was able $50...so less than a new USB mic that's calibrated), I will ask Mikael about using it instead of a USB mic.
Mark
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Post by ansat on Sept 18, 2013 16:12:57 GMT -5
I plug in the beringer in to an art usb dual pre.
And the cross spectrum mics come calibrated for 108.00 shipped.
Tony
sorry for the short response. sent from my phone.
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Post by ansat on Sept 18, 2013 19:00:04 GMT -5
My Behringer preamp does not have a USB out...does yours? I guess I was thinking that DIRAC required a USB mic input because Mikael mentioned using them and not a regular mic, but it might still work. I sent e-mails to 2 places to check into how much it would cost to get a calibration curve for my Behringer...I have a "Generic" one but not one for my specific mic. I've seen data to indicate there's a big variation so having it calibrated to get a specific curve is a good idea. Assuming the calibration cost is reasonable (last I knew it was able $50...so less than a new USB mic that's calibrated), I will ask Mikael about using it instead of a USB mic. Mark Mark you can calibrate with any mic. (confirmed tonight). Dirac gave me the choice of my internal laptop mic, My USB mic or my behringer ecm 8000 using the behringer micropower p5400 hooked into my Creative Xfi sound card. Tony
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klinemj
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Post by klinemj on Sept 18, 2013 19:50:51 GMT -5
Cool - thanks! I found a place that can give me the calibration curve for $55 to $75. I will likely go w/that.
Mark
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geebo
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Post by geebo on Sept 18, 2013 21:27:33 GMT -5
My Behringer preamp does not have a USB out...does yours? I guess I was thinking that DIRAC required a USB mic input because Mikael mentioned using them and not a regular mic, but it might still work. I sent e-mails to 2 places to check into how much it would cost to get a calibration curve for my Behringer...I have a "Generic" one but not one for my specific mic. I've seen data to indicate there's a big variation so having it calibrated to get a specific curve is a good idea. Assuming the calibration cost is reasonable (last I knew it was able $50...so less than a new USB mic that's calibrated), I will ask Mikael about using it instead of a USB mic. Mark Mark you can calibrate with any mic. (confirmed tonight). Dirac gave me the choice of my internal laptop mic, My USB mic or my behringer ecm 8000 using the behringer micropower p5400 hooked into my Creative Xfi sound card. Tony Yes, I even tried a Cross Spectrum Labs calibrated Galaxy CM-140 sound pressure level meter with it's output connected directly to my laptop's mic in and also plugged into a Soundblaster X-Fi's mic in and both methods were recognized by Dirac.
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Post by igorzep on Sept 19, 2013 18:25:31 GMT -5
14 days left on the trial. I would need something set up soon. Can you do pre-out measurements? Also some acoustic measurements that are not in sweet-spot? Pre-out will allow to analyze what and where Dirac is doing. It is practically impossible to find from acoustic graphs what comes from the room and small mic displacements and what is from processing. And I have doubts about impulse response improvements... If they are at cost of making it worse out of the sweet spot then it is doubtful improvement. Generally it is impossible to correct high-frequency late reflections for anything except one single spot. As for correcting frequency response (looking at unsmoothed graphs) Dirac seems to be on par with XT. Just different target curves, but resolution look similar, and is quite low at the low frequencies. XT32 usually correct frequency response at those frequencies significantly better.
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Post by igorzep on Sept 19, 2013 18:34:40 GMT -5
Looking across the whole spl it appears that there is a fixed limit of 6db of gain that dirac is willing to add. Audyssey's max appears to be 8db according to the graph but in many cases audyssey did a lot of attenuating. Audyssey claims it's limit of boost is +9dB. Which I personally think is a way too much (and I've seen it doing more than that... while Audyssey denies it is possible). The limit of attenuating is -20dB.
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Post by igorzep on Sept 19, 2013 18:47:12 GMT -5
I have no access to anything with xt32. We will have to rely on someone else with the gear available. Unless someone in st louis has something that I can use. Same as with Dirac Live there is XT32 based tool for PC - www.ikmultimedia.com/products/arc/But I am not sure if there is a trial for it... It was available some time ago...
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