New mic option from the good folks at Minidsp - Page 2

what mic you currently have?

The chart shown is C weighted. If the mic outputs an unfiltered signal then the correction factors are wrong. I assume the correction factor was prepared by someone who measured the results, so that would indicate the output is post-filter. That makes sense, as being a condensor the capsule must be pre-amped, and it's logical to incorporate the weighting filter into the pre-amp.

Interesting. I need some measurement equipment for room acoustic and speakerdesigning. How accurate would this be vs SOFSCI SoundSweeper wich i am considering to buy? Way cheaper....

This mic along with HolmImpulse freeware would be plug and play with all the features that you really need.

Yeah and REW. That i get.
I was thinking more in terms of quality.
The SOFSCI mic is +4/-2db from 20hz-22khz uncalibrated... Calibrated its +-2db 10-19hz, +-1db 20hz-20khz and +-1.5db 20k to 24k

I made the lilmike mic from his thread

So I went to the post office today and picked up my UMIK-1. Apparently when miniDSP ships it to you they require a signature for delivery. Once I got home and started to unpack it, I must say I was sorely disappointed in what I saw. Not with the actual product, but with the care in which this product was packed. As you can see below there was nothing protecting the carrying case except a thin cardboard shell. Because of this my tab that is supposed to keep it shut was snapped off, the case was open a bit when I opened the box, it is cracked in multiple places, and the bottom is scuffed to no end. Definitely a much different experience than when I opened my calibrated Behringer mic.

As to the mic and accessories, I'm extremely happy with them. The mic has a nice weight to it and is fairly similar to the Behringer, albeit a bit smaller. The small stand is a nice touch and the USB cord feels substantial, if a bit short. I plugged the mic into my macbook pro and it was immediately recognized. Fired up REW and opened the MIDI audio controller and I was able to adjust the gain, add the cal file and it worked first time. There were zero issues, no drivers or software, and nothing else to do except calibrate the REW SPL meter with the new mic. Absolutely fantastic.

^ Glad all seems to work at least...jesus though, 9-10 days in shipping?

James

From the time it shipped it took 5 days. Problem was it took 3-4 days to process.

Think I'm just going to get one right now. Between this and REW, I don't know how much better you can do for $100.


James

I'd like to see someone send one of these to CSL to have it measured/calibrated against what is provided.

Or in the mean time, measure the same source against a known calibrated mic.

These are great for eliminating signal chain from measurements.

I have a calibrated behringer mic that I'm going to try to compare it to in the next few days (calibrated by cross spectrum).

So if a person is wanting to use REW in order to EQ a sub(s), and later a front LCR, is this mic along with a basic laptop all that is needed? No mic-preamp? I am assuming that I would still have to purchase an external sound card due to the fact that my laptop does not have a line in/out, right?

No, you don't need an external soundcard. All you need is 3.5mm to RCA cord which you can get from monoprice. Just use the headphone out jack on your laptop. However you need to have something to send the cal files to that REW creates. This can be a miniDSP, Behringer, etc. If you weren't talking about the cal feature on REW, then yes you can run sweeps and the RTA to make manual adjustments with whatever you have.

I can't say for REW, but with HolImpulse if your laptop has any input and output, even if labeled microphone and headphone, you can connect the two and calibrate the internal card to dead flat.

To clarify, what Fuzz is saying is that you need a 3.5mm mini jack to RCA adapter so the output of REW is sent to the speakers being measured. REW will generate sweep tones which it will send to your amp/speakers then measure the speakers' output via the Dayton USB microphone.

it is the same in REW.
I am curious how the fact that the signal from this mike does not go through the analog line-in channel affect the sound card calibration.

UMIK on top calibrated behringer on the bottom.

EMP-E-41B/Crown XLS2500/macbook pro soundcard

Looks like the same element to me.

The top one has steeper HF roll off, which well may be related to calibration.
I am not sure what to make of the differences in peaks an dips
Edited by zheka - 12/12/12 at 6:05pm

do you happen to have a sub?
it would be nice to see the low frequency difference between those two. especially below 20Hz.

I do, although this was a quasi anechoic of my computer speakers where I don't have a sub. I have yet to hook this up to my main system and take some measurements. Hopefully I'll have time this weekend to do that.

If someone wants to let me borrow one for 24-hours, I'd love to take a look at it. I've got a UMM-6 and have been tearing my hair out these past couple of days trying to match that calibration curve.

PM me if you're interested.

UMIK on the top Behringer on the bottom, this time in the sub frequencies. Outlaw LFM-1 EX. I also had the sub connected to an anti-mode dual core. I'm still getting the hang of the anti-mode, but you get the idea. Pretty similar.

1m



1in



LP

my god they do look similar. minidsp updated the spec sheet from 5hz-20khz flat to 15hz-20khz.

i'm ordering one.

Wow, so now that this mic is available, assuming you have a laptop or other computer, it is now possible to accurately measure your sub(s), mains, and other speakers for a small investment of only $75 dollars!, is this correct? If so, this might put a dent in the Dayton and XTZ kits. Heck, I have been needing a measuring setup and might just go ahead and order one now!

It has been for years, using the Dayton/Behringer mic and Blue Icicle USB mic pre/phantom power. This in effect combines those two in a single housing.

mine arrived last week and took about 9 days total as well (4 for processing). I haven't had time to play with it yet. Don't forget there is a pretty hefty shipping charge on this.

I will be order mine next week!

It took a little less than a week to get everything sorted out, but miniDSP is sending me a brand new mic and I'm shipping them back the one with the broken box.