Which audio calibration file for mike to use - Home Theater Forum and Systems - HomeTheaterShack.com

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post #1 of 11 Old 06-27-12, 12:40 PM Thread Starter
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Which audio calibration file for mike to use

I got calibrated ECM8000 mike couple of months back from Cross-spectrum. I guess I need to go REW->Preferences->Preferences->Mic tab and point calibration file.

I have three narrow band, three one third octave and two polar response XL files. Which one do I need to browse to in calibration field of Mic tab?

I am starting compiling instructions to do bass ringing and water fall graphs for modal first. Please help me to get started on setting calibration file for Mike. Then I will do calibration for TASCAM 144 MKII
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post #2 of 11 Old 06-27-12, 01:05 PM
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Re: Which audio calibration file for mike to use

This may help chinni. See my posts 153

http://www.hometheatershack.com/foru...tml#post513930
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post #3 of 11 Old 06-27-12, 04:13 PM Thread Starter
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Re: Which audio calibration file for mike to use

Thanks for the link. I guess I can point to narrow_band_response_0_degree.frd that I got from cross spectrum. Since I am pointing microphone to ceiling, I am assuming 0 degrees is fine.
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post #4 of 11 Old 06-27-12, 08:38 PM
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Re: Which audio calibration file for mike to use


No, you’d use the 90° file for at-ceiling orientation. The 0° file would be for aiming towards the speaker, which is really best for frequency response measurements. More reading on the topic here .

Regards,
Wayne



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post #5 of 11 Old 06-28-12, 12:08 AM
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Re: Which audio calibration file for mike to use

If you only have the Basic ECM Mic, then like I have, use the Generic Cal file for 90 degree measurements. It's on this page, half way down.

http://www.hometheatershack.com/foru...oads-page.html
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post #6 of 11 Old 06-28-12, 05:10 PM
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Re: Which audio calibration file for mike to use


Hey Will,

Taking measurements with 90° mic orientation using a calibration file that was generated with on-axis (0°) orientation, such as our generic file, will give results showing sagging response at highest frequencies. If you want to take 90° measurements, you should use a calibration file created the same way.

Regards,
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post #7 of 11 Old 06-28-12, 05:21 PM
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Re: Which audio calibration file for mike to use

Quote:
Wayne A. Pflughaupt wrote: View Post

Hey Will,

Taking measurements with 90° mic orientation using a calibration file that was generated with on-axis (0°) orientation, such as our generic file, will give results showing sagging response at highest frequencies. If you want to take 90° measurements, you should use a calibration file created the same way.

Regards,
Wayne

Ah, I thought this was Wayne. Is there a Generic Cal file for 90 degree?
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post #8 of 11 Old 06-29-12, 06:47 AM
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Re: Which audio calibration file for mike to use


What are you measuring (mains? subs?), and what are you trying to accomplish?

Regards,
Wayne



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post #9 of 11 Old 06-29-12, 06:50 AM
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Re: Which audio calibration file for mike to use

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What are you measuring (mains? subs?), and what are you trying to accomplish?

Regards,
Wayne

Mains and Sub together.

I have a 2 IB manifold system, one at the front and one at the back of the room, I want to see how these interact with my Main speakers.
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post #10 of 11 Old 06-29-12, 07:08 AM
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Re: Which audio calibration file for mike to use


Then all you’re really concerned about is perhaps 300-400 Hz and below. A 90° vs. 0° calibration file is only going be different above ~2-3 kHz; below that point they’re the same. Down in the range you’re interested in, you can use either calibration file with either mic orientation.

Regards,
Wayne



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