REW YouTube Tutorial - Page 6 - Home Theater Forum and Systems - HomeTheaterShack.com

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post #51 of 105 Old 10-20-14, 06:58 PM
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Re: REW YouTube Tutorial

Thank you for the great program and tutorial as well.

This will allow to do amazing discoveries about chamber resonance and much more.

Best vibes to all, much love and light for all
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post #52 of 105 Old 10-22-14, 10:28 AM
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Re: REW YouTube Tutorial

WOW!! Didn't know that sound was this complicated...

I find the U-Tube presentations very fine... Also the REW docs are easy to get to and a good read...
Looks like another trip to 'DONATE'

By the several tips already received here it looks like I can keep the small laptop ( portable ) to take with a few patch cords to the hall...
Now to add help to possible good info, I read that a USB i/o for mike out and line in seems very dooable...

Going to U-Tube now to try and find best equipment to fix a room...
Maybe I misread some of the DSP adds, but it sounds like ( no pun ) that a dedicated DSP box just stays in the line to amp. for a most perfect room... Eh??

TNX from DaveR

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post #53 of 105 Old 10-22-14, 10:43 AM
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Re: REW YouTube Tutorial

DSP is fine to address frequency related issues. It cannot address reflections or decay time nor can it address modal nulls. Those things need to be addressed by treating the room.

I am serious... and don't call me Shirley.

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post #54 of 105 Old 10-22-14, 11:50 AM
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Re: REW YouTube Tutorial

OK, and thanks for that, bpape.. Then I take it that a DSP rig or 31 band EQ will do about the same with the exception of maybe the DSP cuts the bands into smaller widths each...
Now I have to ask if there is also a device that will correct for the timing as well??

Unknown territory me me, so TNX again from DaveR
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post #55 of 105 Old 10-22-14, 12:35 PM
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Re: REW YouTube Tutorial

Timing in terms of what?

I am serious... and don't call me Shirley.

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post #56 of 105 Old 10-23-14, 06:34 AM
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Re: REW YouTube Tutorial

Sorry, I meant reflections or decay time... Understand that is a physical room fix...

To start off should I find a 'smart' dsp unit like the feedback destroyer or in my case since the application is permanent for one type of use would the 31 band EQ box suffice?

TNX again from DaveR
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post #57 of 105 Old 10-23-14, 08:29 AM
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Re: REW YouTube Tutorial

DSP is more flexible and it's a parametric vs a graphic fixed type of EQ.

The drawback is that being analog in but providing digital processing, that is adding another A/D and D/A step. Depends on how picky you are bout your sound. If it's just for the LFE channels, it's fine. Personally, I wouldn't put something like that on my main channels.

There are also all analog parametric EQ's available - just that you have to do the tweaking yourself as opposed to running a sweep and letting the unit make the changes (which I'm not really fond of anyway - but that's just my opinion).

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post #58 of 105 Old 10-25-14, 10:31 AM
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Re: REW YouTube Tutorial

TNX much Bryan,

That sets me in the right direction and I am greatful for your advice.
Right now it looks like staying with the 31 band mono EQ set for the only room that it will be playing in, and possibly something like a feedback destroyer down stream of the manual EQ just to take care of any 'surprizes'...

DaveR
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post #59 of 105 Old 10-25-14, 11:17 AM
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Re: REW YouTube Tutorial

Like I said, the BFD is fine on the LFE channels. I just wouldn't use it in my mains chain.

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post #60 of 105 Old 10-25-14, 07:13 PM
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Re: REW YouTube Tutorial

Hi Bryan! Sorry you haven't heard from me this week. This is part of why .

I've been attempting to use the DBX M mic that comes with the DBX Driverack. By all accounts it's an omni mic made for doing measurements. I'm following the GIK-supplied video (much thanks!). The problem I'm having is that when I attempt to do the initial soundcard calibration I'm getting an error telling me that the level is varying by way too much - typically 57db and that I shouldn't use the calibration created.

I'm on Mac OSX 10.9.5 using an old RME Fireface. The Fireface has a software mixer (Totalmix) which allows for creating loopbacks. I've checked VERY carefully and repeatedly that I'm not accidentally looping the output to the input. When I get the initial input level calibration anywhere close to the output level - the resulting sweep measurement clips. I have to have it about 20db lower than the output to make the sweep stay in the green.

BTW, I tried selected the actual (ASIO) driver for the Fireface and the level variation was a LOT higher. in the 90's.

If it matters, my monitoring system is a presonus central station feeding a JBL subwoofer which in turn is feeding a pair Quested v2108 speakers.

Any help would be greatly appreciated. Thanks so much in advance for the great software and the assistance!

Pier Giacalone
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