MiniDSP UMIK-1 Microphone - Page 9 - Home Theater Forum and Systems - HomeTheaterShack.com

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post #81 of 887 Old 12-20-12, 10:46 AM Thread Starter
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Re: MiniDSP UMIK-1 Microphone

That would be a question for John... as I am not familiar with that version.
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post #82 of 887 Old 12-20-12, 01:12 PM
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Re: MiniDSP UMIK-1 Microphone

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It could be differences in calibration methods and mic orientation. To be more precise I should use the orientation for which the mic is calibrated... and I did not give that much thought at the time... all were at 90°. I think I have two files from Herb on my ECM8000... one for 0° and one for 90°, if I am remembering correctly. Of course I can't hear 10kHz very well anyway, so for me it would not be significant.
Right you are !

Pointing the ECM8000 90deg to source , while using the 0deg ( to source ) calibration, would nicely explain the blue line .

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post #83 of 887 Old 12-20-12, 03:07 PM
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Re: MiniDSP UMIK-1 Microphone

The V5.0 OS X version does not have the updates for UMIK, you would have to do SPL calibration in the old fashioned way.
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post #84 of 887 Old 12-21-12, 10:13 PM
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I realized I had the input gain really low in the OSX sound settings, which should explain the low level pop-ups I was getting. I didn't have enough time (had to catch a flight) to run a test tone to confirm.


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post #85 of 887 Old 12-22-12, 05:02 AM
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Re: MiniDSP UMIK-1 Microphone

hi john,

do you plan to update rew on osx to fully use the umik-1?

thx a lot for your work!

regards
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post #86 of 887 Old 12-22-12, 07:07 AM
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Re: MiniDSP UMIK-1 Microphone

Hi Markus, I will make an OS X version, but I need to get a new Mac as my old Mac Mini cannot be upgraded to the latest OS X. I'm hoping to have something to try on OS X before the end of January.
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post #87 of 887 Old 12-22-12, 07:11 AM
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Re: MiniDSP UMIK-1 Microphone

I already have an uncalibrated Behringer ECM8000, but 'm considering buying a UMIK-1 just to get a calibrated measurement mic (the data for ECM8000 at Cross-Spectrum doesn't look very good (sorry, can't post links ) ). I want to use it with full range calibration using software like Dirac Live. Would you say it's worth the investment?
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post #88 of 887 Old 12-22-12, 04:52 PM
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Re: MiniDSP UMIK-1 Microphone

Microphone arrived in 5 days, I am impressed, usually stuff from Hong Kong gets lost or travels for more than a month. Time for some measurements
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post #89 of 887 Old 12-23-12, 03:58 PM
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Re: MiniDSP UMIK-1 Microphone

JUst plugged in my new UMIK, fired up REW and it is working flawlessly.
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post #90 of 887 Old 12-27-12, 02:33 AM
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Re: MiniDSP UMIK-1 Microphone

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That difference of @ 7.5db at 10K is quite significant ( & very much in keeping with what Herb recently discovered when comparing his calibration vs P.E.s, for the same UMM-6 microphone )
Quote:
Sonnie wrote: View Post
It could be differences in calibration methods and mic orientation. To be more precise I should use the orientation for which the mic is calibrated... and I did not give that much thought at the time... all were at 90°. I think I have two files from Herb on my ECM8000... one for 0° and one for 90°, if I am remembering correctly. Of course I can't hear 10kHz very well anyway, so for me it would not be significant.
Well... I'm in the club too, or about to be. Santa Wife has one heading my way from Hong Kong....

I am somewhat concerned about that huge difference up at the high end... I will be using it for speaker measurement and design, so accuracy everywhere is important. I'd like to think I'll be able to trust the supplied cal.

So, a couple of questions... Could you clear up whether you did on axis (or 90deg) measuring, and was the cal files the ones for 0 or 90 deg? And, what do we know about the supplied UMIK-1 file? 0 or 90deg?

I have a couple of the ECM's, one with a cal file from Herb at Cross Spectrum. So I could try comparing as you have for more data...

Should get here soon...
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