MiniDSP UMIK-1 Microphone - Page 41 - Home Theater Forum and Systems - HomeTheaterShack.com

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post #401 of 887 Old 03-15-13, 06:36 PM
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Re: MiniDSP UMIK-1 Microphone

I use to use a Laptop Soundcard calibration until John (REW creator) basically said not to.
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post #402 of 887 Old 03-15-13, 08:35 PM
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That's music to my ears. I did try calibrating the sound card at 44.1, but I'm not sure about my results. Now the issue I ran into was when the Umik was connected, REW would pop up a message about the sound card being calibrated at 44.1, and the Umik being 48k, which will give inaccurate results.

Now I can switch my input to Soundflower(2ch), I can use the Umik with 44.1 but I'm wasn't sure if that was ok. The easiest would be to not have to calibrate the sound card.

Finally, a set of front speakers that I plan to keep! Now I understand what the fuss is all about..
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post #403 of 887 Old 03-16-13, 10:58 AM
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Re: MiniDSP UMIK-1 Microphone

Just an FYI for those waiting, I got my shipping notice yesterday, order was placed 2/22 (right before they went on hold). I don't know if they are shipping all back-orders or not, or chronologically, but they're shipping none-the-less.

Looking forward to playing with this, its my first foray into calibrated mics.
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post #404 of 887 Old 03-17-13, 08:26 AM
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Re: MiniDSP UMIK-1 Microphone

Thank you very much monomer, that is excellent info, can't wait to get this kit!

I want to use this to calibrate my two subs running from my .1 channel (so Mono, witha Y-splitter). What is the best way to do this? One at a time? Both together (where do I point the mic, if I do it this way?) And which plugin would be the best for that? At first, I am not interested in using this for my mains...I am pretty happy with Audyssey for that.

Thanks in advance!

Last edited by McStyvie; 03-17-13 at 09:10 AM.
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post #405 of 887 Old 03-17-13, 10:36 AM
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Re: MiniDSP UMIK-1 Microphone

Realize that your miniDSP will become the splitter. You take the AVR's pre-amp output and connect it to Input1 on the miniDSP. Then connect miniDSP Output1 to one sub and Output2 to the other sub. You now have the ability to select delay(phase) and gain independently for each sub... keep verifying the results in REW after each change.

I have a more complex situation than yours... two mid-bass subs and two ULF subs to integrate into a 9.1 system and finding the best compromise across 8 listening positions spread over two tiers of seating.

I suggest the following:
You first of all turn Audyssey OFF then take individual measurement readings for each sub (you can mute whichever output you desire in the miniDSP) and set delays and gains appropriately for each... if you have more than one listening position then take one measurement at each position and in REW on the "All SPL" screen "average the responses"... now go to and open "EQ" (its the box selection at the upper right of the main screen) ...within the EQ screen select the radio button "miniDSP" from the drop-down "Equaliser" menu and now click on "EQ filters" at the top of the screen. In that window use as many drop-downs as you think it needs, under "Type" select PK (stands for peak) and select freq/gain/Q values to try to level the graph to your target. Next is to input those values into the miniDSP plug-in... use the "Parametric EQ" output box AFTER the "4-way Cross-over" box that corresponds to the output your sub is connected to... I tried the "Import REW file" function using the miniDSP plug-in but for some reason it doesn't recognize the file format so in the end I inputted each peak filter one at a time (its no big deal and takes very little time to do). Once you've done one sub "mute" it and un-"mute" the other and repeat the process. Then un-"mute" both subs and now run Audyssey. After Audyssey go back and verify that because of Audyssey's distance selections that the delay/phasing still look correct, now if you'd like to you can adjust the over-all (meaning with both subs un-"mute") freq response the same way you did it for the individual subs except this time both subs will be playing so now you will make your "Parametric EQ" adjustments within the big box that's BEFORE the "4-way Cross-over" box. That's it! Trust me, it reads more complicated than it is to actually do it.

Have fun...

Oh, I forgot... the direction you point the mic in doesn't really matter that much since the frequencies are all so low they will be omni-directional. I personally just point it somewhat in the direction of the sub I'm measuring and in the middle when both subs are active. And I would recommend the Mono 4-Way Cross-over Advanced plug-in (which is the one I based the above procedure on). You should order it now so you can download it and play around and get familiar with it before your miniDSP arrives and you will immediately see what I'm talking about in the procedures I outlined above.

Last edited by monomer; 03-17-13 at 01:34 PM.
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post #406 of 887 Old 03-17-13, 02:26 PM
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Re: MiniDSP UMIK-1 Microphone

Thanks Monomer, that is a great explanation, and I downloaded the 4-way and it makes perfect sense when you are looking at it! Looks like I just need the delivery then I am ready to go!
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post #407 of 887 Old 03-25-13, 06:42 AM
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Re: MiniDSP UMIK-1 Microphone

Monomer- Since my unit is still stuck in Customs, and they refuse to hurry it up...could you maybe let me know how you would go about rolling off my 10" sub at 30Hz? What I mean is, I would like it to stop putting out at that level and let my 15" er take over all the frequencies below that. Is that an easy thing to do with the mini dsp?

Thanks in advance,
McStyvie!
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post #408 of 887 Old 03-25-13, 11:53 PM
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Re: MiniDSP UMIK-1 Microphone

Yes, just put in your desired cross-over values for each sub. Your plug-in will have 4 cross-over sets available (one for each output). You can select the desired slope, frequency and type of filter for both high-pass and low-pass for each output... use it anyway you want, however you will need to verify by taking measurement readings in REW just so you can maintain a balance between the two subs.

In my case I'm running my mid-bass units and my ultra-low frequency units as if they were a 2-way sub speaker system... meaning I use the miniDSP to control the cross-over between the subs. I utilize a high-pass only on my mid-bass units as I allow the AVR to cross-over with the mains... and I only use a low-pass for my ULF units and let the natural roll-off deal with the bottom end. I'm also using a 48dB/oct slope to minimize any issues in the cross-over region by keeping it small.
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post #409 of 887 Old 03-26-13, 02:45 AM
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Re: MiniDSP UMIK-1 Microphone

Ok, thanks again Monomer! Now if customs would just get off their bums...
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post #410 of 887 Old 03-27-13, 10:38 AM
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Re: MiniDSP UMIK-1 Microphone

So what's the final result here? Is the UMIK-1 not a good choice if you want to EQ subs below 20Hz?

I think I'm going either UMIK-1 or the UMM-6. Of course, at the moment neither are readily available.
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