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Post by sahmen on Dec 16, 2013 15:38:55 GMT -5
Watching this thread: Keep up the great work, and thanks.
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Post by neo20013 on Dec 16, 2013 17:52:36 GMT -5
Unfortunately, i will have to stay away from the measures for about two weeks But next year, i intend to make all the individual measures Markus suggested, and try to address the problems found using the UMC PEQ. It will also be an interesting learning process, and that was also one of the reasons i choose the UMC-200 combo instead an Anthem receiver with ARC.
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Post by markusv2 on Dec 17, 2013 1:41:19 GMT -5
^ Before you do any additional measurements you should a) make setup symmetrical, b) maximize distance of speakers and listening position from boundaries and c) reduce reverberation especially at lower frequencies.
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Post by neo20013 on Dec 17, 2013 4:43:43 GMT -5
a) The L/R speakers are symmetrical, both at 1.5m from center. RS and BS aren't symmetrical, RS is 2m from listening position while LS is 4.5m. I suppose LRC symmetry is the most important, and i cant change surround speakers position; b) L/R speakers are both 80cm from walls; Center is 60cm; Here i have the flexibility to recede L/R 20cm or advance center 20cm. c) This is my main problem, and i'm trying to address it using room treatment. Initially i wanted to buy some GIK panels, that have good reviews and are affordable. Unfortunately, shipping prices from UK to Portugal make this solution less affordable. So i started to learn about isolation materials to make my own DIY superchunk and pannels. I've contacted several construction companies, but this king of material is only produced in large quantities, and i've been in waiting list to receive 4 6" rock-wool panels, and 20 mineral wool panels, for at least 4 months As soon i receive them, i intent to build 1 34" superchunck to insert in the right corner, and 4 6" panels, 2 for sides, and 2 for back walls.
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Post by markusv2 on Dec 17, 2013 4:53:50 GMT -5
Looking at your drawing from your first post the speakers aren't set up symmetrically. Everything is located in the right half of the room.
For the DIY absorbers you need fluffy fiberglass. You should get it at any hardware store. Make the absorbers as thick as possible and mount them with an air gap to the walls.
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Post by neo20013 on Dec 17, 2013 5:07:29 GMT -5
Looking at your drawing from your first post the speakers aren't set up symmetrically. Everything is located in the right half of the room. For the DIY absorbers you need fluffy fiberglass... Yes, you are correct, everything is located in the right half of the room. But that impossible to change Unfortunately, there isn't fiberglass here in Portugal. For the superchunks, i will use Mineral wool, that has a low flow resistance, aprox : 5 kPa s/m2 For the 6" panel, i will use rockool, with a density of 180 Kg/m3.
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Post by markusv2 on Dec 17, 2013 6:01:34 GMT -5
^ Only the past is impossible to change Asymmetric setups will virtually always introduce problems that can't be solved by any amount of absorption or signal processing. No mineral wool in Portugal? Use the fluffy stuff for the panels too. Make them as thick as possible (>20cm). But be aware that those absorbers probably won't fix your sub problems. Nice calculator for playing around with flow resisitivity and thickness: www.acousticmodelling.com/porous.php
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Post by neo20013 on Dec 17, 2013 16:35:43 GMT -5
^ Only the past is impossible to change To use a symmetrical disposition, i would have to place the sofa in a place that would block the stairs
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Post by richardrc on Dec 18, 2013 19:40:46 GMT -5
As I have said before, it would be great if emo provided a setup screen that allowed an input on one channel to be output to any combination of channels whilst allowing us to drop the EQs in and out and modify the x-over slopes on the fly. The current cable swap method is a right royal pain and gives you no easy way to set the EQs.
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Post by markusv2 on Dec 19, 2013 2:55:38 GMT -5
^ Independent crossover slopes would be a great feature. I'd also like to see an upload feature for EQ settings. Setting 11 bands of PEQ per channel with the remote control is a real PITA.
Sending the REW test signal to different speakers can be done with an HDMI connection.
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Post by neo20013 on Dec 19, 2013 5:50:20 GMT -5
Even more important, it would be if there were more bands available to the subwoofer channel, even if they had to reduce the number of bands from the other channels.
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Post by markusv2 on Dec 19, 2013 6:06:40 GMT -5
+1
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Post by richardrc on Dec 19, 2013 14:14:13 GMT -5
I don't own a umc-200, so fantastic news if this works, as it doesn't on a umc-1, as the hdmi handshaking and audio codec lock is abysmal. Sending the REW test signal to different speakers can be done with an HDMI connection.
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Post by markusv2 on Dec 19, 2013 14:37:27 GMT -5
^ I wasn't saying that it works with the UMC-200. I was just pointing out that there is a way to send a test signal over different channels via HDMI.
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Post by petes on Dec 27, 2013 4:12:37 GMT -5
^ I wasn't saying that it works with the UMC-200. I was just pointing out that there is a way to send a test signal over different channels via HDMI. Hi Marcus Are you saying this doesn't work, or we don't know yet if it does. I also tried it on my umc-1 ages ago, but had lots of trouble I seem to recall, but was also learning about REW at the time. I've got a UMC-200 on the way in January so will be breaking out REW, the mic etc. again. Wit the forthcoming b18 release, we should be able to get good results, but as you say it's gonna be a real PITA to enter all of those data points. Pete S
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Post by markusv2 on Dec 27, 2013 4:40:21 GMT -5
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Post by santhoshxtra on Dec 30, 2013 2:12:26 GMT -5
Nice informative thread. A silly question from me; please accommodate! Will a USB mic like Umik-1 with REW give a considerable difference from the stock mic+ EmoQ calibration?
It is not costly to experiment, but with shipping to India and customs duty, it is close to 20-25% of the cost of the prepro itself. So I was wondering if it can give me a significant improvement. I use active speakers and SVS PB12 sub with UMC-200 in an untreated 11' x 15' room.
Thanks in advance.
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Post by markusv2 on Dec 30, 2013 4:33:03 GMT -5
^ The improvement is that you can implement your own equalization strategy. Measurements don't tell you what to do. They simply help with visualizing parts of the nature of a sound field.
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Post by bolle on Dec 30, 2013 4:35:01 GMT -5
You can also use a ECM-40, ECM-8000 or even a cheap microphone - as long as it is calibrated from 20 to about 16.000Hz.
So I would get what is available in India.
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Post by santhoshxtra on Jan 2, 2014 1:19:05 GMT -5
You can also use a ECM-40, ECM-8000 or even a cheap microphone - as long as it is calibrated from 20 to about 16.000Hz. So I would get what is available in India. If I get a mic, then I would need a preamp and a midi interface/sound card which I don't have. Together, it works out to be much more expensive than getting a USB mic. Hence I was looking at a plug n play USB mic. ^ The improvement is that you can implement your own equalization strategy. Measurements don't tell you what to do. They simply help with visualizing parts of the nature of a sound field. Exactly what I was keen to understand. Whether the manual tweaking using such a MIC + REW software would be more effective/ accurate than what EmoQ does with its own mic. Thanks!
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