rew time alignment

Measuring timing of sub(s) to mains with REW, Confused by REW and LFE channel - help appreciated. So 1/8 in linear means -18dB in logarithmic (20log(1/8)=-18dB, As soon as i implement a low-pass filter at 1k5 the data will be half of the data without the low-pass filter. Anyway, REW akan melakukan kalibrasi secara otomatis berdasarkan hasil pengukuran tanpa EQ dan target yang ingin dicapai. In this post I'm just going to show the problem with the REW computed delay time, which is a very serious issue in my opinion. I am using both the Time Align mixed with a little cut in channel gain to do level matching but wondering if this common practice or if i should set all 'Time/Distance' at Zero and then start the level matching via gain cutting. cheers.. I still have yet to give HI a whirl. This then allows REW to give really accurate impulse time plots. If this system with these settings would be used in a live situation you would probably need to temper the mid-highs a bit if pushed to a 100dBa or more.....(something to do with our ears perceiving this as kind of harsh sounding MH's) ;-), The sound will be as good as the band play's, http://www.holmacoustics.com/holmimpulse.php, https://timobeckmangeluid.wordpress.com/2016/10/20/filters-and-stuff/. Rew question re time aligning subs to mains.. Thread starter Brent2222; Start date Today at 1:10 PM; B. Brent2222 Novice Member. I just arbitrarily set the tick on the peak, There is the Group Delay plot, that shows the relative or absolute arrival times of the impulse at various frequencies. REW is free room acoustics and audio device measurement and analysis software for room, loudspeaker and device responses. So 1/2 in linear means -6dB in logarithmic (20log(½)=-6dB, As soon as i implement a low-pass filter at 6kHz the data will be half of the data without the low-pass filter. The optimal alignment may also be used for summarizing a set of time series, since it allows to compute a more meaningful average between sequences which may exhibit time warping. the idea is to have the output from each speaker/sub, arrive at your ears at the same time, becuse some speakers /sub are different distances from you, the time alignment feature can adjust the timing of each speaker. Also the IR get's time stretched and in linear view you see the level dropping. A typical home theater setup is shown in this diagram: As indicated in the diagram, the front left speaker is used as the acoustic timing reference. A few people say the same thing. I would synchronize on the high driver/Mid-high's (no sub)  and after that start phase aligning all at the selected x-overs. The audio measurement and analysis features of REW help you optimise the acoustics of your listening room, studio or home theater and find the best locations for your speakers, subwoofers and listening position. Sorry for the Pink Stuff ;-) Also available at https://timobeckmangeluid.wordpress.com So after helping dozens of guys align subs on a facebook page I moderate peer pressure has won and I made a video on it. I'm guessing it has something to do with the IR Windows option but can't see how you do it. Dan ini lah hasilnya... TADAAAAAA Warna hijau tua adalah response sistem kita setelah dihitung settingan EQ nya oleh REW. In the examples given, sound from the woofer arrives late by less than half a milli-second (1/2 a thousandth of a second) relative to the tweeter. I read everywhere that you can't use USB microphones to do time alignment with REW. Phase aligning both can be done by using delay or my preferred way All-pass filters. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. To answer my own question REW can be configured with one channel for the mic/soundmeter and the other looped from out to in. Hi everyone, I wanted to share a new feature of REW/rePhase which makes combining the two pieces of software to make amplitude corrections in the frequency domain very easy. APL TDA is nice for time aligning too…. This time alignment is necessary as the HD Radio receiver transitions or blends from the analog to the digital signal when first tuned to a station or at the edge of the digital signal coverage where the receiver will blend back to the analog signal. So at a 32K FFT size Smaart will have a frequency resolution in 1.46Hz steps from 1.46Hz up to 24kHz. I do not trust the Delay times computed by the Room EQ Wizard (REW) program for the subwoofer output. If you have a phase control on the subs you can still effect some kind of time alignment but it’ll be a little trial and error. Waktu proses cukup singkat, ngga sampai 1 menit. Time alignment series Why you should time align > Is it really necessary? This is then used to set up time delays in a miniDSP plugin so the drivers are time-aligned. There is a little time difference between left and right speakers -- but both are more or less equidistant from the 'center-positioned' sub. Europe's busiest forums, with independent news and expert reviews, for TVs, Home Cinema, Hi-Fi, Movies, Gaming, Tech and more. I work with just a couple of other analyzers (Smaart/SIM3/SAT-live). You are using an out of date browser. The tick marks the time the treble is received at the listening position relative to the bass. Timing Advance and Time Alignment Timer Timing advance is a negative offset, at the UE, between the start of a received downlink subframe and a transmitted uplink subframe. You must log in or register to reply here. Join the AVForums team live on Wednesdays at 7pm UK time. After that get the phase angles on both drivers to match in there x-over range: i.e. I followed your thread when exponential was setting his equipment up, this was how i did the timing reference, i'm not sure how to get page 3 of that thread up but is this in the right ball park? It's very powerful but doesn't have a 'non-expert' mode! 1. I do not work with REW or any analyzers mentioned in the above comments. By using the loopback timing reference feature of REW (the loopback cable left in the second channel of your sound card), REW subtracts all the sound card and computer latencies and gives you the actual driver to microphone delay, ASSUMING your signal path … I have read much information and even a bunch of threads on the overall matter. Once the ancillary speakers are installed and tuned to your PA, you’ll need to time-align them with the main speakers so that sound coming from the delayed speakers arrives at the audience in time with the sound from the main speakers. I think the phase approach makes a lot of sense, too bad the phase cannot be viewed real time in the RTA.

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