AVS Forum Addicted Member
Join Date: Sep 2002
Location: Wetumpka, AL
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Analog out users who wish to time align the subwoofer with REW.
Earlier in this thread I ask if someone knew of a way to use REW to time align the subwoofer on the analog outs. I posted the same question on the forum that supports REW (not AVS) and John, the author of REW, gave me some great advice.
First, you want to go to generator amd select "Pink PN". I extended the duration to 131,072. Then select "Save PN to WAV file." I saved the wave file to a tumb drive which I then plugged into the back of the Oppo 95. When you do this, the source menu comes up and you select music.
On REW, you go to "RTA." setup the screen width and settings to your preference. Click the red button in the upper right of the screen and using the remote for the Oppo, select the wave file and press play. Reclick the red button in the RTA window. Then select "save". You can do this altering the distance settings fine tuning it as you go. Then go back to the REW main window and click on the tab "ALL SPL". To make it a little easier, I unplugged the sub for one test just so that I could have a reference point for the speaker only. (By the way, I unplugged the front left speaker and set the mike up a few feet away from the right speaker which sits on top of the subwoofer to help eliminate some of the room effect)
For whatever reason, the difference in measurement(actual distance vs accoustic distance due to latency is different than what I measured on my prepro. That's what I was afraid of as I would have assumed that it would be the same but wanted to find some way of independently verifying it.
So you REW people get busy and give this a try. In my opinion, this did help.
As a side issue, I tried the stereo out reassignment to LF/RF and found something a little off about how it sound (wispy) so I returned it to the regular setup. I'm sure I'll give it another try later.