Simplified REW Setup and Use (USB Mic & HDMI Connection) Including Measurement Techniques and How To Interpret Graphs - Page 638 - AVS Forum | Home Theater Discussions And Reviews
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post #19111 of 19118 Old Yesterday, 11:34 PM
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Quote:
Originally Posted by 3ll3d00d View Post
if that graph is what you're hearing then it probably sounds pretty unbalanced.

If I were you I'd take measurements at different positions both with and without your EQ on so you can understand the behaviour of your current setup. This means

- take 3 measurements across the listening area (move mic across the width of the seat but stick to the same height and distance from rear wall), one of these should be the position you've used above, 0.5-1m either side is good
- take a measurement with the mic moved forward (towards the screen) by 0.5-1.0m
- take a measurement with the mic raised up say 50cm from the listening position

repeat for SW and a main channel (you can choose, many people use C for a film setup) + SW

show the with and without eq traces
show the layout of your room and mark on the positions of the mic/subs

this will give you the data you need to decide what to do next


Thank you, I'll get it done.

How do I choose SW + centre?
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post #19112 of 19118 Old Yesterday, 11:36 PM
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Originally Posted by AustinJerry View Post
^ And to add to Matt's excellent recommendations, when you are finished with the measurements, consider making the REW MDAT file available here for download. Many of us use Dropbox.com for sharing measurement files. This will allow us to view the measurements in the format we are accustomed to.
Thanks, will try that.
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post #19113 of 19118 Old Yesterday, 11:47 PM
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Originally Posted by indus1 View Post

Thank you, I'll get it done.

How do I choose SW + centre?
Center set to small - Audio output #3
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post #19114 of 19118 Old Today, 01:16 AM
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Center set to small - Audio output #3

Really? I thought channel 3 was just centre speaker? Does that mean channels 1,2 and 3 all include the SW as well as L, R and C respectively?

Thanks
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post #19115 of 19118 Old Today, 01:18 AM
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For some reason I now can't get any sound out of my sub using channel output 4.

What am I missing??
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post #19116 of 19118 Old Today, 01:35 AM
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Hmm, I've tried to use the same UMIK that I've used for REW to run a dirac calibration on my 88a and it's no longer recognizing the mic.

The umik actually came with my 88a and I've used it many many times without any problems. I've also just used it with REW this morning.

Have I altered something in it by using it with REW? I did load the suggested calibration file for REW.

Btw, I run REW on a windows 10 and dirac software on a Mac.

Thanks
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post #19117 of 19118 Old Today, 01:53 AM
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Quote:
Originally Posted by indus1 View Post
Really? I thought channel 3 was just centre speaker? Does that mean channels 1,2 and 3 all include the SW as well as L, R and C respectively?

Thanks
Bass management converts a C input channel to a C+SW output channel

Channel 4 is the LFE channel, ie an input channel

The SW output channel is LFE summed with the low pass of each input channel
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post #19118 of 19118 Old Today, 02:58 AM
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Originally Posted by JohnPM View Post
Windows, unfortunately, offers only mono and stereo even when the soundcard has been configured for multichannel.
Spend last evening with some deep debugging on Windows and it seems this is true. On Win JavaSound only sees mono/stereo 8bit/16bit 44.1k from the DirectSound implementation. No 96kHz, no 24bit, not more than 2 channels irrespective of how the interface is configured on the OS. Looks like no extended DirectSound interfaces are supported. There is some open-source project providing JavaSound over ASIO on Windows, but it is requiring native interfacing anyway, so makes no much difference to the table, so I didn't look at it further. According to OpenJDK mercurial repository JavaSound wasn't touched at least for the last decade (except one test that was failing irregularly), so it seems there is no interest on improving it and chances it will be done someday are close to zero.

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Looking at a way of exposing that to the user is on my todo list for OS X.
Nice to know. I know there are several people here who run Windows from their Macs only to have the ability to do multichannel measurements with REW. On Linux it seems that multichannel is also supported well with JavaSound. Windows in not anymore on the absolute majority of computers so constantly repeating that JavaSound is not supporting multichannel while it is only true for only a part of PCs in users hands leads us nowhere. That was my point.
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