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Author Topic: Measurement Interfaces  (Read 5363 times)

Scott Carneval

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Re: Measurement Interfaces
« Reply #10 on: October 04, 2016, 02:00:54 pm »

I've been using the SMAART I/O for several years, but I've recently started using my Behringer XR18 for multi-channel measurements. I was looking for a new interface when it dawned on me that the Behringer essentially IS an 18ch USB interface. It actually saves a piece of gear because it's my mixer and interface all in one.
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Mark McFarlane

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Re: Measurement Interfaces
« Reply #11 on: March 02, 2017, 11:46:43 pm »

I know I will get some flack for this, but here is a interface that simply works.

No software-no drivers.

Just plug it in and the software will see it.  Select "device" and you are good to go.

The price is right-so if you lose it-no big deal.

The cheaper one is the Behringer UMC202.  If you want balanced outputs and more inputs the UMC404.

I have been playing around with it for a little while and am pleased.

Every now and then there is a "diamond in the rough".


Ivan, regarding SMAART interfaces, the UMC404 has been replaced by a newer version UMC404HD. Pretty cheap at $99 for 4 mic preamps and the XLR outs are a bonus.  It has global phantom.


Have you ever had a problem with global phantom and looping back your reference from/to your UMC202?  I had a problem years ago with an Edirol interface where the phantom power messed up the loopback signal.


Lately I've been using my GLD as a SMAART interface, but I'm starting to work on other people's systems more frequently and need at least 4 portable channels. $99 is pretty much a no-brainer investment.
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Mark McFarlane
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Nathan Riddle

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Re: Measurement Interfaces
« Reply #12 on: March 03, 2017, 10:47:47 am »


Ivan, regarding SMAART interfaces, the UMC404 has been replaced by a newer version UMC404HD. Pretty cheap at $99 for 4 mic preamps and the XLR outs are a bonus.  It has global phantom.


Have you ever had a problem with global phantom and looping back your reference from/to your UMC202?  I had a problem years ago with an Edirol interface where the phantom power messed up the loopback signal.


Lately I've been using my GLD as a SMAART interface, but I'm starting to work on other people's systems more frequently and need at least 4 portable channels. $99 is pretty much a no-brainer investment.

I thought it was just a bad idea period to run phantom into an output. I use the an XLR-F to TRS-M for the reference signal.
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Mark McFarlane

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Re: Measurement Interfaces
« Reply #13 on: March 04, 2017, 02:33:00 pm »

I thought it was just a bad idea period to run phantom into an output. I use the an XLR-F to TRS-M for the reference signal.


You are correct. I think I didn't have the right cable,... it was a decade ago.
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Mark McFarlane
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Keith Broughton

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Re: Measurement Interfaces
« Reply #14 on: March 04, 2017, 03:05:37 pm »


Ivan, regarding SMAART interfaces, the UMC404 has been replaced by a newer version UMC404HD. Pretty cheap at $99 for 4 mic preamps and the XLR outs are a bonus.  It has global phantom.


Have you ever had a problem with global phantom and looping back your reference from/to your UMC202?  I had a problem years ago with an Edirol interface where the phantom power messed up the loopback signal.


Lately I've been using my GLD as a SMAART interface, but I'm starting to work on other people's systems more frequently and need at least 4 portable channels. $99 is pretty much a no-brainer investment.
I use the 404HD and take a TRS from out 4 (set as test out) and loop it back (TRS) to input 4.
This gives 1-3 mic channels with phantom for measurements and channel 4 is reference.
No issue with phantom on TRS inputs.
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Ivan Beaver

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Re: Measurement Interfaces
« Reply #15 on: March 04, 2017, 03:55:26 pm »


Ivan, regarding SMAART interfaces, the UMC404 has been replaced by a newer version UMC404HD. Pretty cheap at $99 for 4 mic preamps and the XLR outs are a bonus.  It has global phantom.


Have you ever had a problem with global phantom and looping back your reference from/to your UMC202?  I had a problem years ago with an Edirol interface where the phantom power messed up the loopback signal.


Lately I've been using my GLD as a SMAART interface, but I'm starting to work on other people's systems more frequently and need at least 4 portable channels. $99 is pretty much a no-brainer investment.
My standard cable that I use for dual transfer functions has a TRS on one end-but only hooked up to the T and S.

There are 2 cables that come out of the connector.
The connector plugs into the headphone output.

One is a TRS-with the hot to tip and the shield to R (no connection to shield)
This goes to the TRS input of the reference channel

The other cable is a MXLR that has the tip hooked to pin2 and the shield hooked to pin 3.

This allows me to vary the SPL out of the loudspeaker, without affecting the signal displayed-since both the reference and measurement go up and down at the same time.

It is also REAL good for looking at power compression of drivers in real time.
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Ivan Beaver
Danley Sound Labs

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