REW Sound Card Database - Page 11 - Home Theater Forum and Systems - HomeTheaterShack.com

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post #101 of 118 Old 01-13-16, 03:03 PM
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Re: REW Sound Card Database

Ok, thank you very much for the swift reply. I played safe and ordered an USB model from Focusrite.
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post #102 of 118 Old 01-19-16, 01:49 AM
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Re: REW Sound Card Database

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Are the Focusrite Clarett series soundcards compatible with REW?
I'm interested in the 4Pre model. It looks to have a Thunderbolt interface instead of the USB. Is that a problem? My laptop is Asus Zenbook UX31A and it runs on Win8.1. I have been using M-Audio Fast Track Pro with REW for years before, but now I would like to upgrade.

EDIT: I just found out that the Clarett series is currently not compatible with Win8.1, which is a bigger problem in my case. Still, I'm interested in the REW compatibility for the future plans.
The Clarett series are very nice for recording, but is overly complex for REW.

What you (and I) want for REW is a very simple 2-in/2-out USB sound device with phantom power, flat response, low noise, and up to at least 96KHz sampling frequency (for other things besides REW). No fancy DSP effects, mixing, aux sends/returns, none of it. Just 2 ins and 2 outs (especially for Mac users), front panel gain and phantom power, and USB powering (no external wall blob).

Why this simple? I've tried several complex interfaces, and all they do is get in my way. I work on both Windows and Mac platforms, the multi-channel Mac/Soundflower work-around is a royal pain. I need something I can just plug in a go. In the last week I spent several hours trying to get my Motu 4Pre to work at all, then to work right, after it was working fine the last time I used it with REW. Of course, all of this after discovering it's failure when I really needed to use it with REW. The issues were mostly to do with all of the internal mixing/routing, and some driver issues. So my reaction is, simple is better. Simplest is the best.

So I did up this short list. Tried to stay within the parameters above, there's a couple of exceptions:

The Focusrite Scarlet 2i4 - seems a pretty good match, though I've heard somewhere of driver issues, that may be solved by now. In fact, the only downside to it is the 4 outs, which complicates life for a Mac user.

The Presonus AudioBox iTwo - looks promising, hits the requirements, and is bus-powered for both PC and iOS. Might must be the winner.

The Tascam US-2x2 adds midi, but partially fails by requiring external power when connected to iOS devices.

The Roland Duo-Capture EX is another contender, has bus power, external and internal battery power (nice!) and midi, fails at only 48KHz, but would be fine for REW.

Steinberg UR22 looks interesting, up to 24/192, midi, bus power. No iOS compatibility, though.

IK Multimedia iRig PRO DUO - very compact! Includes midi, bus power and battery, PC and iOS compatibility, limited to 48KHz.

IK Multimedia iRig PRO - same as above, but 1 channel an up to 24/96. Tiny! I'd like two inputs, though.

I'm sure there are others, but so far, the Presonus AudioBox iTwo seems to be the closest to ideal. I don't know if it's been tested with REW, but I don't see a reason it wouldn't work.
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post #103 of 118 Old 01-19-16, 02:22 AM
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Re: REW Sound Card Database

Thank you gazoink.
Obviously I made my choice too quickly. You are absolutely right - the bus power, light weight, compact size and simplicity are the key specs to me too. I already bought Focusrite 18i8 and noticed rightaway that I have overlooked the bus power question. However, there are features in it I need for other porposes, like Midi, dual head phone outputs, etc. I just have to buy a minimalistic model as well. Luckily they are a bit cheeper too.
I travel a lot to make acoustical measurements for my friends and in some cases for previoustly unknown persons. I even plan to make a small business out of acoustical measurements, room treatment and consultation.
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post #104 of 118 Old 01-19-16, 01:24 PM
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Re: REW Sound Card Database

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Thank you gazoink.
Obviously I made my choice too quickly. You are absolutely right - the bus power, light weight, compact size and simplicity are the key specs to me too. I already bought Focusrite 18i8 and noticed rightaway that I have overlooked the bus power question. However, there are features in it I need for other porposes, like Midi, dual head phone outputs, etc. I just have to buy a minimalistic model as well. Luckily they are a bit cheeper too.
I travel a lot to make acoustical measurements for my friends and in some cases for previoustly unknown persons. I even plan to make a small business out of acoustical measurements, room treatment and consultation.
Yeah, it's way to complex for reliable easy setup with REW. On-board MIDI is nice, but not necessary, as there are simple/cheap MIDI interface cables available.

Anything that comes with an application like "Scarlett Mixcontrol" is trouble because the application controls what's going on inside the box, which can be a whole lota stuff you don't want if you're taking measurements. I downloaded the Scarlett Mixcontrol app to take a look at it but it checks for hardware and wouldn't run, so I uninstalled it. My Motu 4Pre has these apps too. The problem is, unless you familiarize yourself with the correct mix control settings that work for REW, and hopefully can load a default preset, you can get weird unpredictable results for stuff going on in the box that you don't know about.

Watch out for any plug-ins that run natively in the box, they WILL bite you!
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post #105 of 118 Old 01-19-16, 03:53 PM
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Re: REW Sound Card Database

Hello all,
I have a Mac based system. Mac Pro (late 2013. MOTU 828x. Reference mic is an Audix TM1. Currently taking baseline readings in my untreated control room (10 x 15) and mixing room (20 x 15).
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post #106 of 118 Old 01-19-16, 04:49 PM
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Re: REW Sound Card Database

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gazoink wrote: View Post
Steinberg UR22 looks interesting, up to 24/192, midi, bus power. No iOS compatibility, though.
Do you really mean iOS, or Mac OS X? UR22 is compatible with OS X: https://www.steinberg.net/en/support...sb_driver.html
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post #107 of 118 Old 01-20-16, 02:08 AM
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Re: REW Sound Card Database

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Do you really mean iOS, or Mac OS X? UR22 is compatible with OS X: https://www.steinberg.net/en/support...sb_driver.html

Like I said, no iOS support.
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post #108 of 118 Old 01-21-16, 01:57 AM
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Re: REW Sound Card Database

Got a Presonus Audiobox iTwo today, running through some basic tests on OSX and Win7. Couple of things I found.

Just connecting line out to line it for a test, distortion isn't as low as the Motu 4pre, and is a very soft onset starting at -20dBFS.

Win7 behavior was fine, but it's weird on OS X. Seems like lots of delay, can't run a cal because of the "impulse isn't where it should be" error. Just watchin level meters, the out meter pops right up, the in meter is like 3 seconds behind. Level test output is -20 in OSX, -10 in Win7. Pink pn > RTA test shows very flat on both OS.

Noise is good, not great. Minimum THD is not as good as the Motu, I'll get some figures and post. So far, setup was easy, but this looks like it's ok for acoustic test, not so good for electrical tests.

Will test some more in detail tomorrow.
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post #109 of 118 Old 01-21-16, 11:34 PM
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Re: REW Sound Card Database

Here's a bit of test results, line out to line in only. I'll get to the mic pre later.

The L line out was connected directly to the L line in. Output knob was all the way clockwise, and the input knob was adjusted for unity gain (equal levels in and out, per REW's level meters).

See image, posting tabular data here is a pain.

Note that the OS X measurements are different. The big difference is line output level. Nothing was physically changed on the box itself. All voltage measurements were made with a physical volt meter at the output terminals. Sampling frequency was 44.1 in all cases. Note the OS X produced levels 5dB lower than Win 7 for the same REW generator settings. Distortion measured higher with more harmonic content. We're not dealing with an awful lot, though.

Another OS X phenomenon was a periodic "glitch" that seemed to momentarily bump the noise floor up, then go away.

OS X routing was tried several ways, direct with sound preferences, through Lineout and Soundflower, and by creating a new aggregate device for the Presonus. The Lineout/Soundflower method didn't work at all, the other methods produced identical results.

At this point I don't have an idea why it doesn't work as well on OS X. Anyone have a theory?

The other observation is that the system seems to mush into nonlinear behavior slowly between -10dBFS and -6dBFS (I didn't go higher) rather than remain clean until clipping. This could be a function of the Presonus "Class A" input, but I couldn't pin it down.

I'll look at noise and response as well as the mic input another time.
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REW Sound Card Database-itwo-chart.jpg  

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post #110 of 118 Old 01-31-16, 03:50 PM
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Re: REW Sound Card Database

Hello People,
I'm looking for a USB interface that would support loop back/timing with REW and works with the Umik1 mic which is USB too. The cheaper the better, I only want it to do the timing with REW - not recording anything

Thank you!
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