WTB: miniDSP UMIK-1 or Dayton Audio UMM-6

Discussion in 'Closed (Archived) Sales' started by Luckbad, Oct 12, 2019.

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  1. Luckbad

    Luckbad Traded in a unicorn for a Corolla

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    EDIT: Made a new thread looking for the EMM-6 instead. Can't change this title.

    Checking to see if anyone has a calibrated electret measurement mic they don't need. I was going to get the EMM-6 since I have phantom power, but it doesn't have accurate SPL measurement and I don't have an SPL meter.
     
    Last edited: Oct 15, 2019 at 7:56 PM
  2. atomicbob

    atomicbob dScope Yoda

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    Dayton EMM-6 are serialized and calibration files are available. You look up the calibration file for a specific serial number here:
    http://www.daytonaudio.com/index.php/emm-6-electret-measurement-microphone.html
     
  3. Luckbad

    Luckbad Traded in a unicorn for a Corolla

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  4. mitochondrium

    mitochondrium Friend

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    Of course it is important to compensate the non linearity of te micc (SPL differences versus frequency). Depending what purpose you use the mic for it might not be neccessary to make sure that you measure 85 dB as 85 dB. For instance if you are interested in measuring the frequnency response of your speakers in your room, it is important to make sure that you compensate the non linearity of the mic but you are more interested in the difference in SPL depending on frequency than the absolute value of the SPL. If you want to create filters based on measurements to do DRC, the former is essential (and atomicbob pointed out that the data is available) the latter is just nice to have (but the mic will be more expensive).
     
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  5. atomicbob

    atomicbob dScope Yoda

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  6. dBel84

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    Last edited: Oct 12, 2019
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  7. atomicbob

    atomicbob dScope Yoda

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  8. mitochondrium

    mitochondrium Friend

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    @atomicbob This is great news. If I wasn’t living on the other side of the pond I might have asked to get that loaner.
    One question regarding mic calibration. I use REW for my measurements, computer to a Steinberg UR 22. I have to set input and output level on the Steinberg as well as the volume on my preamp. I do not think I often use the exact same setting. How useful is a one time mic calibration in that case? Wouldn’t I have to calibrate the mic every time I change the settings of in- and output level of the Steinberg and/or the volume on my preamp?

    Edit: I use a Behringer ECM8000 for my measurements (with compensation for its non linear FR) with satisfactory results. If you do DRC you should not correct too much in the treble region anyway (where the non linearity becomes significant).
     
    Last edited: Oct 15, 2019 at 2:40 PM
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