MiniDSP UMIK-1 Microphone - Page 73 - Home Theater Forum and Systems - HomeTheaterShack.com

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post #721 of 887 Old 10-16-13, 03:31 AM
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Re: MiniDSP UMIK-1 Microphone

Thanks again
If you look at the 100Hz peak it varies from 25 to 40dB depending on the gain setting. Can this be explained by the increased noise on the output? The peak most likely comes from one of my aquarium pumps. Even though REW compensates for gain, what gain would you recommend?

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post #722 of 887 Old 10-16-13, 02:32 PM
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Re: MiniDSP UMIK-1 Microphone

I generally leave it at 0 dB.
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post #723 of 887 Old 10-16-13, 02:35 PM
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Re: MiniDSP UMIK-1 Microphone

The rationale being that above 0dB you can run into clipping (by software) if you're measuring loud signals. There is no downside to leaving it at 0dB, even if the measurement level is low, because the signal to noise ratio will always stay the same anyway.
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post #724 of 887 Old 10-16-13, 04:45 PM
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Re: MiniDSP UMIK-1 Microphone

Thanks, then I leave it at 0dB for future measurments.

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post #725 of 887 Old 10-19-13, 11:14 PM
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Re: MiniDSP UMIK-1 Microphone setup issue

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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.
John or anyone, I have a mac book pro and a couple of new Mac desktops. Can you tell me what computer would be best to use and what exactly do I need to download for Apple Safari. Also, what do I need to buy to get started, the Umik? . I imagine the macbook pro would be fine. I would appreciate any help.
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post #726 of 887 Old 10-20-13, 04:39 PM
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Re: MiniDSP UMIK-1 Microphone setup issue

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John or anyone, I have a mac book pro and a couple of new Mac desktops. Can you tell me what computer would be best to use and what exactly do I need to download for Apple Safari. Also, what do I need to buy to get started, the Umik?
You need to install the Java runtime if you don't already have it, then the REW OS X app bundle from this thread. Make sure Gatekeeper is set to allow installs from anywhere otherwise OS X will say the app bundle is damaged and tell you to trash it. If the macbook pro has a built-in mic you could use that just to confirm the REW runs OK, to make measurements you need either an SPL meter that can send a signal to a line in on whichever computer you choose to use, or a USB mic like the UMIK-1, or some other mic (ideally with a calibration file). Examples of equipment are listed in the Cabling and Connection Basics thread, which is the first entry in the Information Index sticky, which is recommended reading before jumping in.
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post #727 of 887 Old 11-20-13, 07:09 AM
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Re: MiniDSP UMIK-1 Microphone

Hi,

I'm going to use REW with my HTPC. Is it OK to use an extension USB cable so the UMIK-1 will reach my listening position?

I will use HDMI to my prepro and optical to my DAC/preamp combo. Is the optical out on my HTPC OK to use?

Thanks,
Dave.
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post #728 of 887 Old 11-21-13, 03:01 PM
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Re: MiniDSP UMIK-1 Microphone

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Is it OK to use an extension USB cable so the UMIK-1 will reach my listening position?
MiniDSP suggest up to 5m should be OK, see http://www.minidsp.com/forum/umik-qu...x-cable-length

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I will use HDMI to my prepro and optical to my DAC/preamp combo. Is the optical out on my HTPC OK to use?
Sure.
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post #729 of 887 Old 11-22-13, 06:25 AM
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Thanks,
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post #730 of 887 Old 11-22-13, 10:53 PM
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Re: MiniDSP UMIK-1 Microphone

Hey all,

I'm just getting my feet wet with REW and plan on purchasing this mic as I only have a laptop and no external sound card. I plan on buying this microphone to use along with my laptop for REW. I am thinking I could use a usb dac to feed to my preamp and this would work fine? I also have an hdmi out on my laptop but I only have a 2ch setup and the hdmi would go to my tv and then optical out on the tv to the DAC? I would think the usb route would work better if REW could output the tones over USB. Any advice or tips for a newbie would be very helpful. I was just going to get the mic and start messing around with REW and figure it out that way.

Thanks
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