MiniDSP UMIK-1 Microphone - Page 59 - Home Theater Forum and Systems - HomeTheaterShack.com

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post #581 of 887 Old 05-16-13, 02:26 AM
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Re: MiniDSP UMIK-1 Microphone

Good to know ... thanks!
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post #582 of 887 Old 05-16-13, 08:47 AM
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Re: MiniDSP UMIK-1 Microphone

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W3Rman wrote: View Post
Did you receive an email for shipping and how many days did it take from the time you ordered? I just ask because it was said that supply was limited and wondering if I will get mine any time soon.
I'm completely caught up on UMIK-1 orders (and almost caught up on EMM-6/Galaxy orders, I should get through my backlog by tomorrow). If you ordered one but haven't received an email from USPS with your tracking information, PM or email me and I'll send your tracking number.

As for limited supplies, disregard that, the miniDSP rep informed me that they have enough stock built up to allow me to reorder.
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post #583 of 887 Old 05-16-13, 08:53 AM
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Re: MiniDSP UMIK-1 Microphone

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Got mine today from CSL! Did a couple measurements. The sensitivity thing is throwing me off a little. Factory cal file says -8.4 dB. CSL cal file does not include. Input signal is well below the output signal when setting levels. SPL cal was done with a RS meter and afterwards says max SPL is 105 dB. Mic is supposed to be good to 130 dB so I'm thinking I need to add the factory sensitivity to the cal file?
According to miniDSP, newer mics have a default attenuation of -12 dB (that should show up when you select the microphone in the input device settings of REW or whatever program). If you are getting a max SPL of 105 dB, 105 dB + 8.4 dB (factory sensitivity) + 12 dB (default attenuation) gives 125.4 dB, which is pretty close to the 130 dB spec.
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post #584 of 887 Old 05-16-13, 08:58 AM
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Quote:
W3Rman wrote: View Post
Did you receive an email for shipping and how many days did it take from the time you ordered? I just ask because it was said that supply was limited and wondering if I will get mine any time soon.

Also, how about some screen shots of the calibration files to compare against.

I understand that for now the Sensitivity data will not accompany the CSL cal. file due to issues with potential conflicts of other accoustic analysis software and some other details. So, SPL should just be calibrated as you did with your RS meter against REW's SPL software meter
Yes, but it seems to limit my measurement capabilities (SPL). I think I'm going to try and add the factory sensitivity cal to the CSL cal file. I can still verify with my RS meter.

Wait, maybe that SPL limit just has to do with clipping. It's been a while since I've done this. Need to play around a bit.

Anyway, the notification I got was from USPS and it arrived two days later. I will try to post curves in a bit.
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post #585 of 887 Old 05-16-13, 01:29 PM
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Re: MiniDSP UMIK-1 Microphone

Here is a graph comparing calibration files I received with my UMIK-1. Factory cal looks pretty good but would give you optimistic low frequency results compared to CSL's files and could be inaccurate up high depending on microphone orientation. Also to note is the factory cuts off at 10 Hz and 20 kHz compared to 5 Hz and 25 kHz for the CSL file.
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MiniDSP UMIK-1 Microphone-umik-1-calibration-files.png  

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post #586 of 887 Old 05-18-13, 06:29 PM
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Re: MiniDSP UMIK-1 Microphone

Ordered today! Thanks for your dedication to get these out Herb!

Casey
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post #587 of 887 Old 05-18-13, 08:50 PM
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Re: MiniDSP UMIK-1 Microphone

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to add the factory sensitivity to the cal file?
Was wondering...In order to add the MiniDSP sensitivity number to the CSL cal file, do I just copy-n-paste the "Sens Factor =-#dB" line to the top? Do I need the quotes? And will it throw anything off?

Thanks
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post #588 of 887 Old 05-18-13, 11:45 PM
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Re: MiniDSP UMIK-1 Microphone

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redsandvb wrote: View Post
Was wondering...In order to add the MiniDSP sensitivity number to the CSL cal file, do I just copy-n-paste the "Sens Factor =-#dB" line to the top? Do I need the quotes? And will it throw anything off?

Thanks
Copy and paste what ever is in the Minidsp file into the top of the CSL file (first line).

All it does is adjust the SPL, to be close to absolute.

If you have a SPL meter you can double check.
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post #589 of 887 Old 05-19-13, 07:06 PM
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Re: MiniDSP UMIK-1 Microphone

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Copy and paste what ever is in the Minidsp file into the top of the CSL file (first line).

All it does is adjust the SPL, to be close to absolute.

If you have a SPL meter you can double check.
Thanks, I suspected that would do it. Just wanted to be sure.


BTW, do you guys use the little foam windscreen that came with the mic?
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post #590 of 887 Old 05-19-13, 10:26 PM
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Re: MiniDSP UMIK-1 Microphone

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redsandvb wrote: View Post
Thanks, I suspected that would do it. Just wanted to be sure.


BTW, do you guys use the little foam windscreen that came with the mic?

I don't for my other mic.

I would email or post Herb, depends if he used it when he calibrated it. I would doubt that he would off.
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