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Mmmm, I was going to suggest that you do have to be using WDM drivers. I don't know what drivers your firewire 1394 interface uses. Java (which REW uses) only supports WDM drivers for audio under Windows, not ASIO. So you have to ensure the card uses WDM drivers (if available).

But, if you're able to set up the input and output levels, the drivers probably OK, so I'm a bit confused why your levels return a poor impulse response.

Be sure that you're using the appropriate test signal in the Check Levels setup. i.e. subwoofer test signal for 0-200Hz measurement, and Mains test signal for full range measure.

Does the sanity check Check Levels in the Measure screen popup return a proper level?

BTW, try -12dB rather than -18dB for your input level in REW.

Also be sure all your monitoring capabilities are shut off.

Were you able to perform the soundcard calibration without any problems and get a good cal file?

brucek
 

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For the majority of the sweep, the input signal is very low. Only near the end is the signal acceptable. What are your measure screen limits (i.e. 200 - 2000Hz)?

You never answered, "Were you able to perform the soundcard calibration without any problems and get a good cal file?" If so, may I see the graph of the file.

BTW, are you using the ECM8000 cal file from our download site?

brucek
 

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Yeah, the soundcard cal is fine.... Too weird.

I guess you've tried shorter sweeps rather than the 1 M.

Did you try the REW pulldown Settings and select "Delete Settings and Shutdown". That can often remove something stuck in its brain......

brucek
 

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Do you perhaps have some sample rate conversion being carried out somewhere. Try the opposite of what you have selected now. i.e set it to 44.1K if you have 48K selected now.

I would also check that java is up to date. Click on update in the java app located in the control panel.

You might also look in the REW error log located in your home directory. Usually it will be in c:\Documents and Settings\yourusername\

The error files are stored there and are called roomeq_wizard0.txt, roomeq_wizard1.txt, etc.....

You can open them with Notepad. There's a rotating list, so choose the one with the newest date.



brucek
 

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Room EQ Wizard started", which is not very usefull information.
Well, that's the output when you have no faults. So, in that context, I guess it's useful.

I have to say I'm now officially stumped.

Funny thing, we find we have the most problems when someone has one of these sophisticated high end cards, and the least problems come from the el-cheapo run-of-the-mill soundcard. :)

If you just want to run REW to do a measure, the internal on-board cards work just fine.... but I do realize it's kind of a challenge thing to find out why your card isn't working.....

brucek
 

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What i can understand is that the Sweep and the captured sound should be somewhat on the same position? Right?
Yeah, for sure the input should start when the output starts . You have some sort of latency there?

Here's a quick pic of a short sweep on my system and also an expanded view of the start. You can see the input starting just as the output starts.

White Black Line

Text Line Plot Pink Magenta


brucek
 

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OK, assuming it's not causing a problem, then he should expand the horizontal scale on the end portion of the input (red) signal and look for evidence of clipping. If it is clipping, then the input level should be reduced to remove it. Seems strange to get clipping though, since he originally was using a -18dB signal level... But then I suppose the band limited pink noise in the Check Levels may not have been covering that clipping area. I suspect he must have been using the subwoofer test signal (band 30Hz-80Hz). His measure was from 50Hz-300Hz.

brucek
 
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