MiniDSP UMIK-1 Microphone - Page 72 - Home Theater Forum and Systems - HomeTheaterShack.com

 4Likes
Reply
 
Thread Tools
post #711 of 887 Old 10-01-13, 03:21 AM
Shackster
Etienne Dechamps
 
Join Date: Mar 2010
Location: London, United Kingdom
Posts: 22
Re: MiniDSP UMIK-1 Microphone setup issue

Quote:
FunkBassPlayer wrote: View Post
I've calibrated the SPL meter in REW with an external SPL meter and all looked well but when I go to perform tests it seems my system needs to be much too loud to get -25 db input to REW. I've tried the set levels but my input from the UMIK seems much too low for the volume my speakers are putting out. When I get it loud enough at my listening position to satisfy REW's -25db input my system distorts badly from the wave that REW generates. I have a rather loud system that shouldn't have any problem hitting 75 db at the listening position.
AFAIK the UMIK-1 volume control is purely digital, so it doesn't really matter what measurement level you end up with, as it makes no difference with respect to noise floor. -25dB in normal measurement conditions with the UMIK-1 seems normal to me considering the max SPL of the mic. Just ignore REW's warnings about measurement level, they don't really make sense when using a fixed-gain mic.

Quote:
FunkBassPlayer wrote: View Post
From the little bit of reading I've done in this thread I take it I should mention that I'm using the analog out of my laptop.
I would strongly advise against that, as laptop analog outputs are among the worst imaginable.
e-t172 is offline  
Sponsored Links
Advertisement
 
post #712 of 887 Old 10-01-13, 06:45 AM
REW Author
 
JohnM's Avatar
John
 
Join Date: Apr 2006
Location: UK
Posts: 6,516
Re: MiniDSP UMIK-1 Microphone setup issue

Quote:
FunkBassPlayer wrote: View Post
I recently purchased a UMIK-1 and can't seem to get it going.
Use the V5.01 beta version of REW from here, it will automatically recognise your mic and prompt you for the calibration file. USB mics operate at lower signal levels (to give them headroom for loud sounds), -25 dB is not required.
JohnM is offline  
post #713 of 887 Old 10-02-13, 07:48 AM
Shackster
wildcrd
 
Join Date: Sep 2013
Posts: 10
Re: MiniDSP UMIK-1 Microphone

Ordered mine two days ago from Cross-Spectrum. I've been checking my inbox like a crack-addict waiting for a response. Anechoic, if you aren't traveling, do you have an eta on shipment? I thought some were available.
wildcrd is offline  
 
post #714 of 887 Old 10-03-13, 01:24 PM
Shackster
wildcrd
 
Join Date: Sep 2013
Posts: 10
Re: MiniDSP UMIK-1 Microphone

So, from reading the forum posts Cross-Spectrum will not test for sensitivity (I am waiting on my umik-1 to arrive). However, if I download the minidsp calibration tied to my serial # and cut-n-paste the sensitivity line from it to the one provided by CS, then the umik-1 will act as an SPL meter correct?

Or, do I need a separate SPL meter to get accurate SPL readings? I did buy a RS digital meter, but it was DOA, which launched me on the process of getting the umik-1. I'm hoping that I can simply return the RS SPL and just use the umik-1.
wildcrd is offline  
post #715 of 887 Old 10-04-13, 04:07 AM
Elite Shackster
 
Join Date: Aug 2011
Location: New Zealand
Posts: 1,296
Re: MiniDSP UMIK-1 Microphone

Quote:
So, from reading the forum posts Cross-Spectrum will not test for sensitivity (I am waiting on my umik-1 to arrive). However, if I download the minidsp calibration tied to my serial # and cut-n-paste the sensitivity line from it to the one provided by CS, then the umik-1 will act as an SPL meter correct?

That should be fine
Phillips is offline  
post #716 of 887 Old 10-04-13, 06:53 AM
Shackster
 
arttu's Avatar
arttu
 
Join Date: Oct 2007
Location: Finland
Posts: 8
Re: MiniDSP UMIK-1 Microphone

Cross Spectrum Lab web site says that Calibrated MiniDSP UMIK-1 microphones are sold out. I had already decided to go for one. Any ideas as to when these will be available again?
arttu is offline  
post #717 of 887 Old 10-15-13, 08:12 AM
Shackster
 
Join Date: Apr 2010
Location: Norway
Posts: 13
Re: MiniDSP UMIK-1 Microphone

I'm not sure if this has been asked before, but should the mic level in control panel (Windows7) be set to +12dB? I have done some RTA noise measurements and I got the impression that the SPL was wrong?
I guess when using the UMIK-1 one should not use any calibration file for the input sound card, only the mic calibration?
Finally should I use "adjust RTA levels" when measuring background noise?

Cheers
Vidar
vidareje is offline  
post #718 of 887 Old 10-15-13, 01:57 PM
REW Author
 
JohnM's Avatar
John
 
Join Date: Apr 2006
Location: UK
Posts: 6,516
Re: MiniDSP UMIK-1 Microphone

Quote:
vidareje wrote: View Post
I'm not sure if this has been asked before, but should the mic level in control panel (Windows7) be set to +12dB? I have done some RTA noise measurements and I got the impression that the SPL was wrong?
Shouldn't matter, REW compensates for the Windows volume setting, but make sure you use REW V5.01 beta.

Quote:
I guess when using the UMIK-1 one should not use any calibration file for the input sound card, only the mic calibration?
Correct

Quote:
Finally should I use "adjust RTA levels" when measuring background noise?
No, that is to produce plots that are more easily compared with sweeps. Just read the SPL figure as shown top right, but bear in mind it is unweighted, or read the figure on REW's SPL meter with whatever weighting you select.
JohnM is offline  
post #719 of 887 Old 10-15-13, 02:48 PM
Shackster
 
Join Date: Apr 2010
Location: Norway
Posts: 13
Re: MiniDSP UMIK-1 Microphone

Thank you very much for the reply
I use the latest version 5.01 beta. The volum seems to make differences.
The two attachments show the results from +24dB setting and -31dB?

Cheers
Vidar
Attached Thumbnails
MiniDSP UMIK-1 Microphone-teststoy31.jpg  

MiniDSP UMIK-1 Microphone-teststoy41.jpg  

vidareje is offline  
post #720 of 887 Old 10-15-13, 06:27 PM
REW Author
 
JohnM's Avatar
John
 
Join Date: Apr 2006
Location: UK
Posts: 6,516
Re: MiniDSP UMIK-1 Microphone

If you go all the way to +24 in a very quiet environment you will see the effect of the extra gain on the output noise level of the mic electronics.
JohnM is offline  
Reply

Bookmarks

Tags
microphone , minidsp , umik1

Quick Reply
Message:
Options

Register Now




PLEASE COMPLETE ALL REQUIRED FIELDS BELOW... THANKS!

REQUIRED FIELDS ON THIS PAGE
YOU MUST COMPLETE ALL OF THESE

Username
Password
Confirm Password
Email Address
Confirm Email Address
Random Question
Random Question #2




User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
PLEASE READ BELOW PRIOR TO ENTERING AN EMAIL ADDRESS!

ATTENTION!

YOU MUST ACTIVATE YOUR ACCOUNT!

Activation requires you reply to an email we will send you after you register... if you do not reply to this email, you will not be able to view certain areas of the forum or certain images... nor will you be able download software.

AN INVALID EMAIL ADDRESS WILL CAUSE YOUR ACCOUNT TO BE DELETED!

See our banned email list here: Banned Email List

We DO NOT respond to spamcop, boxtrapper and spamblocker emails... please add @hometheatershack DOT com to your whitelist prior to registering or you will get nowhere on your registration.


Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML is not allowed!
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

 


For the best viewing experience please update your browser to Google Chrome