New to REW and looking for some info. - Home Theater Forum and Systems - HomeTheaterShack.com

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post #1 of 33 Old 02-19-08, 07:48 AM
watsonte
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New to REW and looking for some info.

So last weekend I finally got a RS SPL and attempted to test the response of my subwoofer, however, an error message popped up every time telling me I had to much head room. The volume was not great enough? Then yesterday evening I tried the same setup and found that the volume was too great.

I am using an X-FI Xtreme Music sound card and the line in is the same as the Microphone, I think, but have read in numerous posts that the Microphone jack is not suitable for testing when connecting the SPL out to the sound card.

More or less I have been reading for a couple of days now trying to figure out what I am doing wrong and was interested in knowing if the Sound Card could be the problem.

Also should I be hearing audio from the L/R channels when testing the subwoofer? Or could I only send sound to the subwoofer using the analog input on the back of my AVR?

Thanks to any who reply. I am very new to this so please bare with me.
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post #2 of 33 Old 02-19-08, 08:16 AM
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Re: New to REW and looking for some info.

Quote:
have read in numerous posts that the Microphone jack is not suitable for testing when connecting the SPL out to the sound card.
Correct, the mic input is not suitable unless it's the type that can be toggled with software between line-in and mic. Generally, you require a simple line-in since the RS meter outputs a line level out. Note that an SPL meters output is dependant on the scale used.

Quote:
if the Sound Card could be the problem
No, that soundcard is fine. Be sure you're using stereo plugs, since the jacks are stereo. Be sure to turn off all effects and soundfields, and use two speaker stereo mode for the soundcard only.
If you're able to complete the soundcard calibration routine, you're good.

Quote:
Also should I be hearing audio from the L/R channels when testing the subwoofer?
The analog line-out of the soundcard should connect to the AUX or CD in of your receiver. You can use a Y-splitter if you want at that point to enable both left and right mains.

brucek
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post #3 of 33 Old 02-19-08, 08:19 AM
watsonte
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Re: New to REW and looking for some info.

Quote:
brucek wrote: View Post
Correct, the mic input is not suitable unless it's the type that can be toggled with software between line-in and mic. Generally, you require a simple line-in since the RS meter outputs a line level out. Note that an SPL meters output is dependant on the scale used.


No, that soundcard is fine. Be sure you're using stereo plugs, since the jacks are stereo. Be sure to turn off all effects and soundfields, and use two speaker stereo mode for the soundcard only.
If you're able to complete the soundcard calibration routine, you're good.


The analog line-out of the soundcard should connect to the AUX or CD in of your receiver. You can use a Y-splitter if you want at that point to enable both left and right mains.

brucek
Alright thank you for the quick reply I will be certain to go through connections and attempt to get a new sweep.
 
post #4 of 33 Old 02-19-08, 05:24 PM
watsonte
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Re: New to REW and looking for some info.

Alright I have finally begun testing again and I think I have an issue when using the line in/mic input on my sound card. I can hear it as though the SPL is a microphone I dont think that should be the case any info in regards to my situation would be greatly appreciated.
post #5 of 33 Old 02-19-08, 05:47 PM
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Re: New to REW and looking for some info.

Quote:
I can hear it as though the SPL is a microphone
This is a feature called monitoring that has to be disabled before REW can be used. Every soundcard calls it something different, but it results in the situation you describe. Look in the cards application to find out how to turn it off....

brucek
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post #6 of 33 Old 02-19-08, 06:22 PM
watsonte
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Re: New to REW and looking for some info.

Quote:
brucek wrote: View Post
This is a feature called monitoring that has to be disabled before REW can be used. Every soundcard calls it something different, but it results in the situation you describe. Look in the cards application to find out how to turn it off....

brucek
Is there anything standard when it comes to finding this. I have googled and searched and found practically nothing regarding this and my X-Fi card.
post #7 of 33 Old 02-19-08, 07:09 PM
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Re: New to REW and looking for some info.

Are you using Vista or XP?

In Vista it will look like this. Make sure the one I circled is disabled
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post #8 of 33 Old 02-19-08, 07:19 PM
watsonte
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Re: New to REW and looking for some info.

Quote:
Canadian_Dude wrote: View Post
Are you using Vista or XP?

In Vista it will look like this. Make sure the one I circled is disabled
Im using XP and I see nothing similar to the menu you have shown. This is actually kinda sad, I am fairly tech savy and have built a number of PCs, I am 1 year away from being an Electrical Engineer and yet I can't seem to turn off my Mic on my PC.
post #9 of 33 Old 02-19-08, 07:26 PM
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Re: New to REW and looking for some info.

If you open up your volume mixer and go to options I think it is, and then properties, you should see a couple radial buttons with one that says recording and see if you can turn it off there.
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post #10 of 33 Old 02-19-08, 07:36 PM
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Re: New to REW and looking for some info.

Also see this thread with regard to CMSS and also the red + symbol above the line-in slider. The Soundblaster external may operate the same as the one in the thread I mention.

Either way, post a pic of your soundcard mixer and also the Windows Playback and Record mixer.

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