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Post by phaselinear on Jan 12, 2015 13:54:01 GMT -5
I can't stress enough the importance of making sure AGC is turned off in windows for the microphone. Caused me a big headache. :confused:
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Post by rswood on Jan 13, 2015 1:07:34 GMT -5
I have run dirac at least 10 times, some with slightly different speaker placements, but most with the same speaker placements but different mic placements. The speaker graphs were all pretty consistent in frequency and spectral readings and for that matter the sound was better than non dirac.
I read Tony,s suggestion about turning off the AGC, and the difference was not small, the graphs were different in frequency and the sound was different in a very good way. The AGC did not just effect levels, but the frequency readings were changed, some significantly.
Emotiva, should make this well known, as I am sure a lot of people could benifit from this information.
I will run Dirac again soon to confirm the significance of the difference between AGC on and off.
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cawgijoe
Emo VIPs 
"When you come to a fork in the road, take it." - Yogi Berra
Posts: 5,032
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Post by cawgijoe on Jan 13, 2015 5:41:48 GMT -5
I have run dirac at least 10 times, some with slightly different speaker placements, but most with the same speaker placements but different mic placements. The speaker graphs were all pretty consistent in frequency and spectral readings and for that matter the sound was better than non dirac. I read Tony,s suggestion about turning off the AGC, and the difference was not small, the graphs were different in frequency and the sound was different in a very good way. The AGC did not just effect levels, but the frequency readings were changed, some significantly. Emotiva, should make this well known, as I am sure a lot of people could benifit from this information. I will run Dirac again soon to confirm the significance of the difference between AGC on and off. Agreed. If I had not read this, I would have run Dirac with AGC and assumed everything was fine. Even with AGC it sounded great to me. But big difference without it. This should be on their FAQ. |
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Post by phaselinear on Jan 13, 2015 19:38:00 GMT -5
Running Dirac with AGC seems to take your less efficient drivers and make them quieter than normal because the calculations are being made with false data that was compensated for with AGC. To the Dirac program, the less efficient drivers get cut back because the AGC made them seem just as loud during the testing phase when they in fact are not. AGC creates false data.
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Post by ansat on Jan 16, 2015 18:23:52 GMT -5
Bold and made red
AGC Must be turned OFF in the microphone properties and the gain should be set to 100%.
Tony
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Post by adam631 on Jan 16, 2015 19:15:54 GMT -5
Bold and made red AGC Must be turned OFF in the microphone properties and the gain should be set to 100%. Tony Hey Tony, Just wondering how did you find out to turn off AGC for the mic? I don't remember it being in the manuals, but it sure did make a difference in how my system sounds. Just wish I knew about it before when I ran so many tests and my levels were so off. I don't think I would of ever figured this stuff out without all of your help. Thank you so much!!! |
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Post by SticknStones on Jan 16, 2015 19:16:03 GMT -5
If anyone gets miscellaneous clipping alerts (failed run) when testing it could be like me and set the levels too high. As in this pic, each channel's volume is locked together. Adjust the level on any of them and you are adjusting them all. So click on each one and only adjust the one with highest level to be in the good green area. Do not then adjust any others. View AttachmentI am not sure if anyone else pointed this out but you have the gain on max and that will clip. You need to bring it out of the red and balance the mic gain and the output volume. I think your volume on the XMC using that low of an output will also be low. |
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Post by ansat on Jan 16, 2015 19:36:29 GMT -5
Bold and made red AGC Must be turned OFF in the microphone properties and the gain should be set to 100%. Tony Hey Tony, Just wondering how did you find out to turn off AGC for the mic? I don't remember it being in the manuals, but it sure did make a difference in how my system sounds. Just wish I knew about it before when I ran so many tests and my levels were so off. I don't think I would of ever figured this stuff out without all of your help. Thank you so much!!! Adam, it was just tinkering. With my room so quiet, I had to set the gain on dirac to where the noise floor was at or below the scale. So I started messing with the settings while dirac was running. Tony |
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Post by phaselinear on Jan 21, 2015 13:10:46 GMT -5
Doe's anyone know if using a USB extension cable on the microphone can affect the Dirac calculations?
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Post by phaselinear on Jan 21, 2015 13:15:45 GMT -5
Every time i run Dirac I usually wind up with a lower than normal center channel volume. After a few run throughs I have a usable filter file but am wondering why the trial and error?
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Post by zarthaz on Jan 22, 2015 0:46:54 GMT -5
Doe's anyone know if using a USB extension cable on the microphone can affect the Dirac calculations? I tried with an extension USB cable, a 5 meter long one, only one I got. Didn't work. XMC-1 starts right away with the test tone stuff after starting up the Dirac program, and after closing the Dirac program the XMC-1 still puts that test tone at a low volume through the left speaker. Gotta turn it off on the back to stop it and go back to normal operation. |
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KeithL
Administrator 
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Post by KeithL on Jan 22, 2015 1:51:30 GMT -5
The microphone's analog output is converted to digital by the little module that is incorporated into the cable. Once it is digital, the numbers won't be affected by adding a longer USB cable. However, the module itself may not be able to communicate reliably with the computer if the cable is too long. So, while a too-long USB cable might cause Dirac to crash, if it works and completes its calculations, the results themselves should NOT be affected.) Doe's anyone know if using a USB extension cable on the microphone can affect the Dirac calculations? I tried with an extension USB cable, a 5 meter long one, only one I got. Didn't work. XMC-1 starts right away with the test tone stuff after starting up the Dirac program, and after closing the Dirac program the XMC-1 still puts that test tone at a low volume through the left speaker. Gotta turn it off on the back to stop it and go back to normal operation. |
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KeithL
Administrator
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Post by KeithL on Jan 22, 2015 1:55:03 GMT -5
Definitely. AGC SHOULD be off by default, but sometimes it isn't (it seems to have something to do with which driver Windows decides to use). Oddly, it doesn't always affect the results but, when it does, it is always for the worse. Unfortunately, there seems to be no way for the software itself to override this setting. (And, yes, this will be mentioned prominently in the FAQ after the next update, and in the updated version of the manual.) Bold and made red AGC Must be turned OFF in the microphone properties and the gain should be set to 100%. Tony |
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Post by rocky500 on Jan 22, 2015 2:07:35 GMT -5
Doe's anyone know if using a USB extension cable on the microphone can affect the Dirac calculations? I use a USB 3.0 2m extension. It dosen't matter that is USB 3.0, it is just what I had here. Works great on the Emo mic and my Umik. |
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hemster
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Particle Manufacturer
...still listening... still watching
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Post by hemster on Jan 22, 2015 2:18:22 GMT -5
Doe's anyone know if using a USB extension cable on the microphone can affect the Dirac calculations? I use a USB 3.0 2m extension. It dosen't matter that is USB 3.0, it is just what I had here. Works great on the Emo mic and my Umik. I used a 4 foot USB extension cable to reach my front row seating and it worked fine with my Emotiva mic. |
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Post by rocky500 on Jan 22, 2015 2:21:30 GMT -5
Whoops I forgot which forum I was on. Mine is around 6 foot 5 inches. (just for you guys)  |
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Post by zarthaz on Jan 28, 2015 2:37:40 GMT -5
Ended up buying a 1 metre ( 3 foot) long USB extension cable, ( USB 2 ).
Doesn't work, same thing happening that occurs with the 5 metre long cable.
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Post by rogersch on Jan 28, 2015 3:30:00 GMT -5
Ended up buying a 1 metre ( 3 foot) long USB extension cable, ( USB 2 ). Doesn't work, same thing happening that occurs with the 5 metre long cable. Well I bought a three meter long USB-3 cable and it works very well! |
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Post by zarthaz on Jan 28, 2015 4:13:58 GMT -5
Ended up buying a 1 metre ( 3 foot) long USB extension cable, ( USB 2 ). Doesn't work, same thing happening that occurs with the 5 metre long cable. Well I bought a three meter long USB-3 cable and it works very well! Hmmm. may buy a USB 3 cable then and give that a try. If that don;t work, I suspect my mic may be broken. Would explain my poor Dirac results, ran it all again over the weekend, very little difference to the previous run. |
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Post by geebo on Jan 28, 2015 8:05:25 GMT -5
Anyone try an XLR extension between the mic and cable?
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