REW on macOS Sierra (10.12) - Page 2 - Home Theater Forum and Systems - HomeTheaterShack.com

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post #11 of 17 Old 01-05-17, 02:47 PM
Few
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Re: REW on macOS Sierra (10.12)

I hope this is an appropriate thread for this question...

I've been running a freshly downloaded version of REW on a MacBook Pro, using an external mAudio usb interface for the mic, and the laptop's toslink output via a miniDSP openDRC-DA8 for the stimulus, and getting inconsistent results. Perhaps I just need to adjust some default setting in the preferences? Buffer size?

Some frequency response measurements work fine, but roughly half yield truncated high frequency measurements (it looks like the high frequencies fall of a cliff around 10 KHz). Those measurements also seem to have impulse responses with extra-large wiggles before the main spike. In addition, every once in awhile (but much less often), the system just seems to receive no signal even though I can hear the speaker receiving the stimulus.

I'm a new user so I apologize if I'm just repeating something that's been discussed before. I didn't find anything with my search.

Thanks,
Few
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post #12 of 17 Old 01-05-17, 02:50 PM
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Re: REW on macOS Sierra (10.12)

Try the latest 5.18 release.
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post #13 of 17 Old 01-05-17, 03:03 PM
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Re: REW on macOS Sierra (10.12)

Thanks for the prompt response. If memory serves, I was having trouble when using 5.17. I'll freshen things this evening and try again.

Few
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post #14 of 17 Old 01-06-17, 09:20 AM Thread Starter
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Re: REW on macOS Sierra (10.12)

I've been on 5.16 since I started this thread.

Will update to 5.18, rejig (got new parts but still waiting on TDA amp) and retest.
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post #15 of 17 Old 01-19-17, 10:36 AM
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Re: REW on macOS Sierra (10.12)

I wanted to report back after updating to REW 5.18 and gaining some experience with it. I run into fewer problematic scans than I did with the earlier version, but still encounter them intermittently. Are there particular settings I should use to minimize the likelihood of a faulty frequency scan?

Thanks very much.
Fwe
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post #16 of 17 Old 01-19-17, 11:20 AM
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Re: REW on macOS Sierra (10.12)

Quote:
Few wrote: View Post
I wanted to report back after updating to REW 5.18 and gaining some experience with it. I run into fewer problematic scans than I did with the earlier version, but still encounter them intermittently. Are there particular settings I should use to minimize the likelihood of a faulty frequency scan?

Thanks very much.
Fwe
Some Tips:

(A) If you're currently doing multiple sweeps for each data capture, don't.
- It's a known issue that multiple>successive sweeps can sometimes mess up the final result.

(B) Make sure all your Sampling Rates agree with each other ( in your Mac's control panel, within REW and any choices that are within dedicated soundcard driver software ).


Last edited by EarlK; 01-19-17 at 02:40 PM.
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post #17 of 17 Old 01-19-17, 06:45 PM
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Re: REW on macOS Sierra (10.12)

I'm doing single sweeps but thanks for the advice. I'll double-check on the sampling rates. They may not match up.

Thanks again.
Few
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