Speaker Workshop not returning freq. response.

Juggy · 2nd February 2010, 01:35 PM

Hi;

I have spent a number of hours over the last few days with speaker workshop and trying to get a frequency response bot near-field and far-field. I have gone through Claudio's complete setup procedure (less the impedance, i am using another software for impedance testing). I have triple checked my wiring and volumes setup.

The first (rather trivial) problem was that i did not have phantom power on my mic pre-amp, so i got another mic-preamp that has phantom power. I checked my sound card and it is all working correctly.

I checked all the cables, connections and still, when i go to do a near-field response, i am getting a flat line across the spectrum.

Has anyone else had this problem? I'm just about out of ways to figure out the root cause of this problem.

Any help is greatly appreciated.

Jugveer

Ron E · 2nd February 2010, 11:25 PM

Post pictures of your measurement.in.l and r, and your measurement.out files.
It is very important to review these. Make sure your markers encompass the impulse.

jbateman · 3rd February 2010, 03:07 PM

It is also important to check the soundcard's latency. I have 2 Intel PC's. One shows a latency of 1msec and works fine with SW.

The newer PC has a latency of 20msec, but even after adjusting for that, the Impulse and Freq response are all wrong.

2nd February 2010, 01:35 PM	#1
Juggy diyAudio Member Join Date: Apr 2008	Speaker Workshop not returning freq. response. Hi; I have spent a number of hours over the last few days with speaker workshop and trying to get a frequency response bot near-field and far-field. I have gone through Claudio's complete setup procedure (less the impedance, i am using another software for impedance testing). I have triple checked my wiring and volumes setup. The first (rather trivial) problem was that i did not have phantom power on my mic pre-amp, so i got another mic-preamp that has phantom power. I checked my sound card and it is all working correctly. I checked all the cables, connections and still, when i go to do a near-field response, i am getting a flat line across the spectrum. Has anyone else had this problem? I'm just about out of ways to figure out the root cause of this problem. Any help is greatly appreciated. Jugveer

2nd February 2010, 11:25 PM	#2
Ron E diyAudio Member Join Date: Jun 2002 Location: USA, MN	Post pictures of your measurement.in.l and r, and your measurement.out files. It is very important to review these. Make sure your markers encompass the impulse. __________________ Our species needs, and deserves, a citizenry with minds wide awake and a basic understanding of how the world works. --Carl Sagan Science is a way of thinking much more than it is a body of knowledge. --Carl Sagan

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3rd February 2010, 03:07 PM	#3
jbateman diyAudio Member Join Date: Oct 2000 Location: The People's Republic of Maryland	It is also important to check the soundcard's latency. I have 2 Intel PC's. One shows a latency of 1msec and works fine with SW. The newer PC has a latency of 20msec, but even after adjusting for that, the Impulse and Freq response are all wrong.

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