Generating REW test signals -- anyone doing it?

Mike-48

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I am starting with REW but have some experience with audio measurements. Because of system configuration, I am planning to generate test signals with REW ahead of time and store them as FLAC files, to be played for measurements. (That is explained somewhere in the manual.)

Is anyone else here doing that already? If so, would you care to offer tips on exactly what signals to record? Any other tips on the technique will also be welcome. Thanks!
 

Sonnie

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I record timing reference sweeps to play back in Roon using my UMIK-2 for measurements... when needed.

40768
 

Mike-48

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Hi Sonnie,

Thanks for the info!

So I guess a good set of test signals to have at hand for use with REW would be a pair (L, R) of what you have shown (though I'd do it at -12 dB or less)? Got to say, I'm surprised you have it at 0 dB.

For when working only with bass, is there any value in having a pink noise signal as well? It can be easier on the ears and speakers, perhaps, but I don't know if REW makes use of it or not.

Oh, also -- do you find a 10-sec sweep is really necessary for measuring? Or would a shorter sweep do as well?

Thanks,
Mike
 

Sonnie

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Main Amp
Benchmark Media AHB2 Monoblocks
Additional Amp
Emotiva XPA-Eleven
Computer Audio
Intel NUC w/ Roon ROCK
DAC
miniDSP SHD (Two-Channel Music Only)
Universal / Blu-ray / CD Player
Panasonic UB9000 4K UHD Player (for movies only)
Front Speakers
MartinLogan Renaissance ESL 15A
Center Channel Speaker
MartinLogan Focus C-18
Surround Speakers
MartinLogan EFX Surrounds
Surround Back Speakers
MartinLogan ElectroMotion ESL
Front Height Speakers
MartinLogan EM-IC
Rear Height Speakers
MartinLogan EM-IC
Subwoofers
SVS SB16-Ultra x4 (music) + PB16-Ultra x2 (movies)
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JVC DLA-NX9
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Elite 128" Screen
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Hi Sonnie,

Thanks for the info!

So I guess a good set of test signals to have at hand for use with REW would be a pair (L, R) of what you have shown (though I'd do it at -12 dB or less)? Got to say, I'm surprised you have it at 0 dB.

For when working only with bass, is there any value in having a pink noise signal as well? It can be easier on the ears and speakers, perhaps, but I don't know if REW makes use of it or not.

Oh, also -- do you find a 10-sec sweep is really necessary for measuring? Or would a shorter sweep do as well?

Thanks,
Mike
Yes... -12dB ... I opened REW up on my computer here at the shop and copy/pasted, where I actually never use it. I suppose it is defaulted to 0dB. I did change the other settings, but didn't catch the 0dB.

I think anywhere from 5-10 seconds is fine. The 10s appears to be the default, and I believe that is what I've been using. I've got those on my Roon server at home.

I do have pink noise recorded too, but that's for level matching.
 

Sonnie

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My AV System  
Preamp, Processor or Receiver
Monolith HTP-1 Processor (Movies and Surround)
Main Amp
Benchmark Media AHB2 Monoblocks
Additional Amp
Emotiva XPA-Eleven
Computer Audio
Intel NUC w/ Roon ROCK
DAC
miniDSP SHD (Two-Channel Music Only)
Universal / Blu-ray / CD Player
Panasonic UB9000 4K UHD Player (for movies only)
Front Speakers
MartinLogan Renaissance ESL 15A
Center Channel Speaker
MartinLogan Focus C-18
Surround Speakers
MartinLogan EFX Surrounds
Surround Back Speakers
MartinLogan ElectroMotion ESL
Front Height Speakers
MartinLogan EM-IC
Rear Height Speakers
MartinLogan EM-IC
Subwoofers
SVS SB16-Ultra x4 (music) + PB16-Ultra x2 (movies)
Video Display Device
JVC DLA-NX9
Screen
Elite 128" Screen
Remote Control
Universal MX-890
Streaming Equipment
Roku Ultra
Streaming Subscriptions
Lifetime Roon Subscription
Tidal
qobuz
Netflix
Amazon Prime
Satellite System
Dish Joey 4K
Other Equipment
Kaleidescape Strato S 12TB
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