SRM Turtle beach help! - Page 4 - Home Theater Forum and Systems - HomeTheaterShack.com

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post #31 of 47 Old 12-16-08, 07:15 PM Thread Starter
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Re: SRM Turtle beach help!

here it is! It is the exact same graph.
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SRM Turtle beach help!-soundcard.jpg  

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post #32 of 47 Old 12-16-08, 07:27 PM
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Re: SRM Turtle beach help!

Quote:
here it is! It is the exact same graph.
That's the graph with the vertical set from -3dB to +3dB. Set it to -30dB to +30dB

As an example, here's two graphs of the exact same data but with the scale difference I describe above.


-3dB to +3dB
SRM Turtle beach help!-srm-soundcard-cal-file-1.jpg


-30dB to +30dB
SRM Turtle beach help!-srm-soundcard-cal-file-2.jpg

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post #33 of 47 Old 12-16-08, 07:36 PM Thread Starter
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Re: SRM Turtle beach help!

help me out with the settings. I have the left at 10 and the right set at 200 the top is 105 and the bottom is 45. What do i need to change to get the graph you have?
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post #34 of 47 Old 12-16-08, 07:41 PM
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Re: SRM Turtle beach help!

left = 2
right = 20000
top = +30
bottom = -30
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post #35 of 47 Old 12-16-08, 07:44 PM Thread Starter
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Re: SRM Turtle beach help!

here you go!
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post #36 of 47 Old 12-16-08, 08:03 PM
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Re: SRM Turtle beach help!

Huh, I'm really surprised at how poor that is. It's as if a brick wall filter is at 120Hz.... Weird.

Nope, no good for REW, unless you limit your low end limit of measurements to 120Hz.... Not of any use for a sub..

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post #37 of 47 Old 12-16-08, 08:05 PM Thread Starter
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Re: SRM Turtle beach help!

no other trouble shooting tips?
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post #38 of 47 Old 12-16-08, 08:22 PM
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Re: SRM Turtle beach help!

Not much else I can think of.

It's a fairly basic measure of the output looped back to the input of a soundcard with a straight cable. The only thing that should be revealed is the total looped frequency response of the card itself. As long as you have no equalizer, soundfield, or filter settings turned on, and the cards mode is stereo (hopefully you have it set to two speakers), and the cable is a simple wire, then it should show the true response of the card. Your response looks fine except for the very smooth and rapid dropoff at 120Hz, which isn't normal.....

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post #39 of 47 Old 12-17-08, 07:39 AM
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Re: SRM Turtle beach help!

That is a crossover filter response, the card must be set up to cross over to a sub at 120Hz, the rest of your signal is coming out of the 0.1 sub connection. Turn off the Turtle Beach card's surround processing, just set it up as a stereo card.

Edit: To do this, set the speaker configuration to Stereo on the Speakers tab
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post #40 of 47 Old 12-17-08, 09:18 AM
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Re: SRM Turtle beach help!

Quote:
To do this, set the speaker configuration to Stereo on the Speakers tab
I believe the stereo or 5.1 switches only affect the multi-channel output port. He's (correctly) using the line-out port that should always be simple stereo without the possibility of any high or low pass filtering. Either way I did get him to ensure it was in 'two speaker' output and that made no difference. Something is sure amiss though...

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