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Topic:
Calibrating AV Receivers located far away from speakers
This thread has 35 replies. Displaying posts 16 through 30.
Post 16 made on Thursday October 30, 2014 at 19:02
longshot16
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All the chest beating isn't really necessary. I think everyone here knows there is a real difference but they are just trying to quickly deploy a system.

I am too tired to reply to this but I have taken HAA Level 1 and know what it is like to actually calibrate a system.

If you drop the word calibrate and use setup it may change the discussion a bit.

I have my installers run the AVR's setup for basic purposes.

I don't know how many charge and actually really calibrate a system.

Try educating folks instead of shunning them for their perceived short comings. It really is better for everyone.
The Unicorn Whisperer
Post 17 made on Thursday October 30, 2014 at 19:07
Zohan
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On October 30, 2014 at 18:07, Brad Humphrey said...
Call them up and see what they are offering. The training was really good a decade ago - I took both and got something from both.

There are also other training avenues as well.
Gold-line use to have courses to take.
The ASA (Acoustical Society of America) has courses.
JBL has courses thru out the year, as do other manufactures and test equipment vendors.
It is best to start with courses geared toward "small room acoustics" however. Since that is what we deal with. And the THX & HAA courses do that perfectly. The other courses come in handy as well thou - outdoor sound systems, large venues you might work on, and an expanded acoustic knowledge in general.

Been trying for a couple years. More knowledge is always better, even if I only get a little out of it it's worth it.
Having said that, I'll look into those other ones but the one I really wanted to get into was HAA.....their website is ridiculously out of date and i've left 2 messages at the phone number that were never returned.
Post 18 made on Thursday October 30, 2014 at 19:13
DeuceTrinal
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On October 30, 2014 at 17:52, Brad Humphrey said...
You don't have to spend a whole lot of time calibrating the audio however. Unless you are charging for a full audio calibration session, you can do a minimum and match (or better) what the receiver does in about an hour.
In just an hour, it is amazing what you can do with a cheap RTA (something like a PAA3 $399), a good tape measure (Stanley FatMax $19), a calculator ($9), and a piece of paper to scribble on with the knowledge of the formulas you need (ohms law, 1125 ft/s, hypotenuse, etc...).
[note: a cell phone with RTA app is NOT a damn measurement tool, it is a gimmick]. The SPL apps can be useful for a down & dirty level 'balancing' however (not for sub). [A weighted pink noise please].

If you want to spend several hours doing a full calibration (and making the money for doing a full calibration), you'll need more and better equipment than that. But the end result you do for the client, will be way beyond what the adjustment in the receiver can do. As you will also be adjusting the room - moving things (speakers, seating location, objects in the room), adding things (drapes along this wall, acoustic treatments hear & there) and taking things away ("What do you mean I need to remove this mirrored wall behind me?").

What mid price (<$450) receivers let you control multi band EQ? Most receivers I'm working with these days only do reasonable EQ through audessy or mic setup, all you get control of manually is level and delay (distance).
More zip ties!
Post 19 made on Thursday October 30, 2014 at 19:35
highfigh
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On October 30, 2014 at 15:39, Fins said...
Y'all are professionals. I can't believe you trust that $2 mic more than your ear

What makes you think your ears can hear more accurately than Audyssey? Can you adjust the low end in 100 increments, by ear? No, you can't. The chance of getting the same results are infinitesimally small. Do you wear hearing protection when you work with power tools? Do you crank your stereo when you drive? Do your ears ring? If you answer with no, yes and yes, you CAN'T hear accurately enough to do this as well as Audyssey.
My mechanic told me, "I couldn't repair your brakes, so I made your horn louder."
Post 20 made on Thursday October 30, 2014 at 19:58
Brad Humphrey
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On October 30, 2014 at 19:13, DeuceTrinal said...
What mid price (<$450) receivers let you control multi band EQ? Most receivers I'm working with these days only do reasonable EQ through audessy or mic setup, all you get control of manually is level and delay (distance).

The opinion will vary, but I think of myself as doing pretty low end systems. And receivers in the $250-$500 MSRP range are very low end. I would consider 'mid price' to be in the $600-$1000 MSRP range and where you start to get an actual OK receiver. Many of those give you a lot of adjustment.
Post 21 made on Thursday October 30, 2014 at 20:11
Brad Humphrey
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On October 30, 2014 at 19:02, longshot16 said...
All the chest beating isn't really necessary. I think everyone here knows there is a real difference but they are just trying to quickly deploy a system.

I am too tired to reply to this but I have taken HAA Level 1 and know what it is like to actually calibrate a system.

If you drop the word calibrate and use setup it may change the discussion a bit.

I have my installers run the AVR's setup for basic purposes.

I don't know how many charge and actually really calibrate a system.

Try educating folks instead of shunning them for their perceived short comings. It really is better for everyone.

Whom are you replying to? Surely not me, as I have not shunned anyone that I am aware of. Simply trying to educate as you say.

If you took my comment about the cable extension as an offense, it surely was not either. I was giving you information to let you know, that the changes a long extension cable makes to a high impedance signal (high frequency roll off due to capacitance, etc...), will certainly alter the readings. And that without test instrumentation, you have no way of knowing how much it has been altered.

My biggest concern is those installers that do simply just run the self-calibrate feature and leave. In the past (many years ago), these self systems could actually make the system sound much worse - it was better not to touch the EQ at all, than to use it without checking.
Now days they are much better. But none are perfect. I would still recommend not using it at all, if you don't have the gear to check it. There are times that it could be way off and you would never know - because very few people have golden ears (not even me). And even self proclaimed golden ears have been proven wrong at times. Hearing is VERY subjective and influenced by before & after noises, and conditions. Much more so than video.
Post 22 made on Thursday October 30, 2014 at 20:35
longshot16
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I agree with you on all fronts to be quit honest. The systems are light years ahead of where they were even five years ago. To be honest I dont know exactly what the added legnth of wire does to the accuracy of the microphone but I have done it three times in the recent months and it made the rooms sound much better subjectively.

They sounded so good in fact that even I (who does know audio and can hear most things gone right and wrong) was happy with the initial results.

I am not a level 2 guru yet but have that on my 2015 goals. I plan to buy some test gear. I would like to know your feedback on the Studio Six Digital App with the mic that HAA is using.

They have almost eliminated the Sencore gear all together. I haven't talk to Gerry in months but I think he said that's what they are steering folks towards.
The Unicorn Whisperer
Post 23 made on Thursday October 30, 2014 at 21:41
tweeterguy
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On October 30, 2014 at 13:43, Easton Altree said...
Tweeterguy, Many receivers, like Yamaha, don't use Audyssey and are only set up using the included microphone. I have this exact problem at home. I tried extending the microphone with a length of cat6, and the results are OK, just not as good as I have heard with an unaltered mic.I actually brought this up to the Yamaha engineers at Cedia. They mentioned that they had heard this feedback already.

such devices as... Audyssey or whatever your flavor of audio calibration tools is; AudioTools, Sencore, an RTA, ETA, etc.
Post 24 made on Thursday October 30, 2014 at 21:57
Fins
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On October 30, 2014 at 19:35, highfigh said...
What makes you think your ears can hear more accurately than Audyssey? Can you adjust the low end in 100 increments, by ear? No, you can't. The chance of getting the same results are infinitesimally small. Do you wear hearing protection when you work with power tools? Do you crank your stereo when you drive? Do your ears ring? If you answer with no, yes and yes, you CAN'T hear accurately enough to do this as well as Audyssey.

I can get it better than that $2 mic.
Civil War reenactment is LARPing for people with no imagination.

Post 25 made on Thursday October 30, 2014 at 21:59
longshot16
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What makes you thinks these things are $2. I doubt they are more than .50 cents in cost.
The Unicorn Whisperer
Post 26 made on Thursday October 30, 2014 at 22:14
Brad Humphrey
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Sencore, a long time ago used to make very good test equipment. Somewhere in the 90's I think (not sure), something changed and they became more of a marketing company. Indeed, in the mid to late 90's I got over $10K worth of Sencore gear myself. Huge mistake.
I still have a Sencore RF signal meter (analog/digital) but I need to really replace that - it is a PIA to use.
All the video calibration stuff I got rid of a long time ago (junk), except the VP401 media generator I kept (which was upgraded from a POS VP300).

The Audio analyzer I had (SP295), I sold to EJ for a really good price. So even though it was kind of a POS, he got a good deal on it - certainly worth the money.

I have looked at the Studio Six Digital stuff and it looks nice.
But I really want to get the Gold-Line TEF25 with all the extras - but that's almost $6K (I already have Gold-Line impedance meters, polarity checkers, etc..).
Studio Six Digital sure is a lot cheaper and prettier :)
Post 27 made on Thursday October 30, 2014 at 22:34
Fins
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On October 30, 2014 at 21:59, longshot16 said...
What makes you thinks these things are $2. I doubt they are more than .50 cents in cost.

I was being generous.
Civil War reenactment is LARPing for people with no imagination.

Post 28 made on Friday October 31, 2014 at 06:50
longshot16
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Brad,
I have the Studio Six app but I know the mic and multiplexer are where the true professional level gear benefits are. I might make the jump as it is less than the Audyssey piece (which is still super easy to deploy for my team).

I might contact Audio Control today to discuss the pricing.
The Unicorn Whisperer
Post 29 made on Friday October 31, 2014 at 09:30
highfigh
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On October 30, 2014 at 21:57, Fins said...
I can get it better than that $2 mic.

How much time do you spend working with the speaker distance settings? If you don't, you won't be accurate.
My mechanic told me, "I couldn't repair your brakes, so I made your horn louder."
Post 30 made on Friday October 31, 2014 at 10:50
punter16
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Proud member of the "use supplied mic for distance and change center channel and subwoofer levels afterward" crew.
See our Youtube page for info about smart homes, great audio and more.

[Link: youtube.com]
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