One benefit of the StormAudio ISP is that one can have a Profile with the subwoofer time and phase aligned to L/R for two channel content and a separate Profile with the subwoofer time and phase aligned to the center speaker for best dialogue intelligibility for movie content. I used REW 'Trace arithmetic' which includes the impact of phase. I think the spectrogram plot is showing the subs are slightly ahead in time alignment. So with REW we can measure and use the info to place multiple subs and we know placement is good. Podcast: Best Hi-Fi products of 2020, Plus Best of the Month for TV Shows & Movies, | Anthem AVM60 4.0 | 2 x Crown XLS 1502 Amplifiers | DIY L&R | M&K CS22 | Zappiti 4k HDR | Roku |. To answer my own question REW can be configured with one channel for the mic/soundmeter and the other looped from out to in. Good stuff, its always nice to hear someone getting the best out there system for nothing more than a few hours learning rew and optomising the system. I seems to work really well. With the sub located behind the mains apply a time delay to the mains respective to the distance between the two ? I'm looking a setting up for some measurements with REW and the line out from my radio shack sound meter. I put in an hour getting to grips with REW. By measurement? JavaScript is disabled. If you are using an … The administrator has disabled public write access. 1 Home Entertainment Tech Community & Resource. If you are using a USB mic, you may be able to use the new "acoustic timing reference" feature. This app note will explain how to use the acoustic timing reference feature of Room EQ Wizard (REW) with a miniDSP UMIK-1 to accurately set delay between speakers in your home theater.. Copyright © 2000-2020 M2N Limited E. & O.E. You can use features like impluse response etc, and use the frequency sweeps to look for tell tale phase dips in the response where the speakers and sub overlap. (REW will simply set the impulse response peak at 0 without a timing reference.) I must say I'm having trouble understanding the phase, group delay and spectrogram plots. Then if we plan to use Audyssey we will eq flat in REW/minidsp or equivalent so that when we hand off to Audyssey and it measures it sees a nice smooth flat target which is what it wants. The below screen capture recreates the process so you can see the REW controls used to create it. This section is dedicated to showcasing or sharing valuable information about Subwoofer Tuning. Ah. The mains are set to 2.8meters distance, with the subwoofer set to 3.8meters distange on the Tag processor, which I have assumed offsets any processing delay of the SMS-1. This website uses the TMDb API but is not endorsed or certified by TMDb. Then about 5 hours moving and measuring. I did some further reading on htshack. Had we measured left+right mains in that session we would have seen the the exact trace shown in the A,B average. I must say I'm having trouble understanding the phase, group delay and spectrogram plots. Before and after REW waterfall measurement plots attached. There is a much more detailed amd comprehensive support section for REW on the forum its downloaded from, so your probably best asking there for help on its more advanced operations. If you are using an external soundcard, you can use a loopback connection. Multi-way Xover + Dirac Live on DDRC-88A/D. This allows you to see the exact time discrepancy between sub and speakers and easily adjust it. ... accurate phase alignment using REW's Alignment Tool. You must log in or register to reply here. Try looking up minimum phase in the help file. The No. If so, does changing the delay and inverting polarity change the measurement? It also isn't looking at adjacent seats for alignment. Not enough information... how are you determining whether the phase is aligned or not? If not, first see the app note UMIK-1 setup with REW.REW version 5.15 or later is required.