Digital Acoustic Correction for Desktop & HiFi speaker systems using Room EQ Wizard and rePhase - P1

Part 1
This tutorial will take you through the process of generating a stereo impulse response filter based on measurements taken in your listening space. It is broken down into four main parts, which I hope will help make the segments easier to follow. The entire program time of the tutorial is slightly under one hour.
Your filter will be a 32-bit floating point WAV file, which can be loaded into just about every convolution engine around these days. Some examples include Roon, JRiver, HLC, SIR and SIR2, Convology XT, MConvolutionEZ, Impulser2, and more.

[@timlink7817]

Thank you for these videos. Very helpful! I've been playing with REW and use a trick to correct phase without introducing echo noise or changing the frequency response. When comparing two different phases from measurements you can close the window down a lot, like 2 cycles when doing the A/B to get the phase difference. The phase remains largely intact even though the frequency response changes a lot. With that phase difference result, 1/A it to make a phase correction filter. Set the max allowed gain to zero, and then adjust the target level so that the frequency response of the 1/A result comes out flat. That will give you a phase correction filter that does not change the amplitude. Multiply that by your magnitude adjustment and it will adjust for phase and frequency response as expected. Helpful for me since I don't run Windows, and rePhase doesn't run on Mac.

[@jasonc331]

So Glad you went ahead and did the video. I told you you have the NAC for teaching. I finally made it to Atlanta room is almost ready.

[@davidbrancato]

Thanks! I'm working on a video for the other procedure... the one that uses a single point.

[@scotttomashek9099]

David, I have a couple questions. Is there a way to connect outside this thread to discuss? My original measurement, the phase wasn't terrible. After going through all the steps, the phase has a ton of wraps. It went from 1-2 wraps to 90-100 wraps. Otherwise I think I followed all the steps. I watched all 4 videos and took notes to make sure I was catching all the steps.

[@cnkosm6536]

Thanks for these 4 tutorials! I'm about to begin with this part but can you please tell me in what conditions you did the measurments? Did you use acoustic timing reference?

[@davidbrancato]

Yes I did use acoustic timing reference. When you measure the channels make sure the reference chirps come from either the left speaker or the right speaker each time. Doesn't matter which one, but keep it the same for both speakers. Also I aimed the mic straight up at the ceiling.

[@williamblackwell9558]

Awesome video. Thanks

[@davidbrancato]

Thanks! Be sure to check out the single-point version of this. I have personally been getting better results from that procedure, which is a little different. You can still use multiple measurement points, though, if you want to experiment. Have fun and enjoy the filters.

[@williamblackwell9558]

@@davidbrancato I just finished up and the results are awesome. I am starting on the single-point version now. thanks again.