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Post by anfieldude on Nov 23, 2012 9:50:13 GMT 8
I'll kick this off and see if I can reference the official Audyssey setup from AVS here.
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Post by anfieldude on Nov 23, 2012 9:52:04 GMT 8
On another note, I was reading from the Ask Audyssey site, Chris K from Audyssey stating that XT32 must (MUST in capital) be run with Dynamiq EQ on. I wonder if this is the reason why one encounter with XT32 yielded harsh highs from it as I switched DEQ off as I normally do. Maybe when I have the chance, I will investigate this.
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Post by klimal on Nov 23, 2012 12:36:56 GMT 8
Recently, I bought a calibrated spl meter, the CM140+ from Cross Spectrum.
Using it to level check after AntiMode8033C/AudysseyXT, the levels are higher by +4dB, consistently across all the channels.
Using the RadioShack meter, they are also higher but by a lesser margin of +2dB.
So when auditioning systems, the variance in the calibrated spl with have an impact to the wow factor.
A system that is louder will always sound more dynamic and have greater impact and the bass will be more punchy vs a system that is correctly calibrated with regards to the spl level.
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Post by anfieldude on Nov 23, 2012 14:48:46 GMT 8
Recently, I bought a calibrated spl meter, the CM140+ from Cross Spectrum. Using it to level check after AntiMode8033C/AudysseyXT, the levels are higher by +4dB, consistently across all the channels. Using the RadioShack meter, they are also higher but by a lesser margin of +2dB. So when auditioning systems, the variance in the calibrated spl with have an impact to the wow factor. A system that is louder will always sound more dynamic and have greater impact and the bass will be more punchy vs a system that is correctly calibrated with regards to the spl level. Doc, Audyssey mics are rated to be +/- 3dB or something like that, so in real life u could hv up to 6dB variations from mic to mic. I hv quite a few Audyssey mics and I think 3 ACMH1 mics (from the SVS AS-EQ1, and 2 from Onkyo 876). I find that they are different about 2dB from each other. Audyssey Pro will solve this as the mic for Audyssey pro is calibrated individually. |
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Post by klimal on Nov 23, 2012 17:11:52 GMT 8
One would think they would give a better mic after spending thousands for an avr with the latest Audyssey for xxx levels of resolutions..
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Post by junwei on Nov 28, 2012 10:35:52 GMT 8
Even the commercial microphones need to be calibrated ...like meters used for video calibration....
Some calibrated mic costs few thousands ....
I've asked few fellows on REW during my HAA class and they told me it's not accurate because of the microphone and other factors in the sound card ....
So, it's always better to get professional tools if you really wanna get something accurate ...
I'm currently checking on the NTi XL2 RTA ...but it costs almost RM6K over before shipping and tax ...
Other option I'm looking at is the Ipad2 IAudioInterface2 with 4 mics + 4micMux ...the kit costs USD2999 excluding freight and tax.
We have been using this Ipad2 iAI2 kit and it's quite consistence but I still think Nti XL2 is the best but to do spatial averaging, you have to take readings after readings on different spot ...whereas iAI2, you just leave those 4 mics anyway and keeps taking reading ....
Another thing about audyssey XT32, in a really small room we have calibrated on, the subwoofer measurement had gone hairwired ...causing one of our F15HP to ratter like hell even when volume on the sub is at 9oclock while AVR is -6dB .... when move to a bigger room and run audyssey again, we can up the AVR to +4dB and F15HP vol at 12 oclock ..and everything works well ...
So, I am wondering how accurate Audyssey in our AVR is ...probably few out of many will have bugs?
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Post by htkaki on Nov 28, 2012 14:57:16 GMT 8
The F15HP rattles even at 9 o' clock?
I wonder the XTZ Pro would be a any good.
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Post by junwei on Dec 4, 2012 11:26:10 GMT 8
Yes bro, it rattles even at a 9 oclock position with AVR in the -6dB !! we thought there's something wrong with that unit of F15HP ...until I re-sold it to another customer (after I've done thorough testing to ensure nothing is wrong with amp and driver). And it has no issue with this customer. So, the only thing I can say is Audyssey is doing something weird in that room ..probably picking some info wrongly. XTZ Pro, I've never tried but I guess it would be better off using REW if you are going to buy XTZ. One thing about REW is we need to get our SPL re-calibrated properly with a microphone calibrator before doing any calibration ( ie: how can we know the 75dB on the SPL is accurate if it's not being calibrated first?). Also the HAA guy also mentioned that loading the cm140 calibration file isn't as accurate because different CM140 might be having different readout.... Well, I guess that's what we get for budget calibration. I'm ordering a set of calibration kit from them and will do a comparison with my REW+CM140 setup and let you guys know  |
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Post by junwei on Dec 4, 2012 11:27:44 GMT 8
the NTi XL2 kid is around RM8000 ..that's only a XL2 unit and mic ....quite pricey for 2 pieces of gear .... I would probably go for the Ipad2 iAI2 kit that comes with 4 mics and multiplexer and microphone calibrator |
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Post by htkaki on Dec 31, 2012 13:26:25 GMT 8
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