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Equalizer APO, REW and Rephase WOW!
Equalizer APO, REW and Rephase WOW!
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Old 5th January 2017, 01:17 PM   #11
arcgotic is online now arcgotic  Romania
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yes.
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Old 5th January 2017, 02:50 PM   #12
merlin el mago is offline merlin el mago
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yes.
Thank you.
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Old 6th January 2017, 01:24 AM   #13
CabinetMakerRyan is offline CabinetMakerRyan  United States
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Originally Posted by KaffiMann View Post
...
Ok, so after much desperation I finally managed to find a program called Pedalboard 2, it works, it's simple enough for even me to figure out, and after configuring it I just set it to automatic startup procedure with admin rights, seems to work fine. It seems to automagicly do the job even after reboot, which is awesome. CPU usage is not worth mentioning at all, between 0 and 0,5%.

A bit concerned about lag, it's definitely different from before, not sure if it's for the better or worse yet, but seems more stable at least.

niallmoody.com - Pedalboard2

It may well be that there are other programs more suited for the job, but this worked for me, at least in my quest for linking different devices together, I pray to the deity of digital sound processing that this will be sufficient. Should there be too much lag still I can probably get it down to around 10ms for filters with a bit more work, but it seems fine for the short time I've tested it.
Thanks! I'm going to check this out, this looks like it has a lot of potential.
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Old 6th January 2017, 06:43 PM   #14
KaffiMann is online now KaffiMann  Norway
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Originally Posted by CabinetMakerRyan View Post
Thanks! I'm going to check this out, this looks like it has a lot of potential.
I thought so to, until I discovered that it stops working when the screen saver kicks in so it needs a restart, probably not a problem for non hdmi outputs.
Also does not seem to work with other VST plugins than the default selection.

Still looking around.
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Old 1st February 2017, 04:46 PM   #15
datrumole is offline datrumole  United States
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Originally Posted by CabinetMakerRyan View Post
I've been working on calibrating audio systems for so long and now this combination is truly something special to me.

I would like to offer help to anyone who would like to learn how to make use of these tools because all of them are free and they can replace a lot of very expensive hardware.

Here's a great example of that.

Using Equalizer APO, you can copy the L and R channel to other outputs on an 8 channel sound card. Then you can use REW to dial in the exact FR that you want and save those filter settings to a file. Then open rephase, import the measurement from REW and the filter settings. In rephase you can also correct the phase and set up crossovers for each channel. Save the impulse as a mono WAV and select that as the convolution filter in Equalizer APO and WHAM you've got an active crossover, linear phase system.

You can then remeasure that channel, create another filter to fine tune the response and load that into the next bank in rephase to make a more refined impulse file. You can repeat that enough times to make your frequency response look unbelievably smooth.

This system is superior to a lot of pro tools like Diraclive because for one thing, dirac live is practically useless for phase correction because you can only get accurate phase data at close range with lower volume levels. Rephase allows you to correct phase blind by inputting the crossover topology.

One of the best things about Equalizer APO's convolver is that it's suprisingly low latency.

I'm starting this thread to see what kinds of projects you all have going on using any of these amazing tools.
Hey! so i've been a lurker here for some time, and too have found sanctuary in REW/EAPO but have had minimal success pulling off convolution successfully. I have a rather unique setup compared to most

GEAR
htpc: win7, plex for 90% of stuff watched. EAPO with a miniDSP UDAC8 which is a usb DAC converter giving me 8 RCA outputs at 2vRMS

denon 2310: has multi-in, use to power LCR (diysg fusion8) and SUR L+R (volt 6s)

diy icepower amp: have 3 magnum12 woofers in a custom 2.5cuFt tuned to 24hz that are powered off this

CURRENT SETUP

EAPO pushes all channels to virtual channels for processing (split.txt)

LR4 for a 250hz split between LCR highs (fusion8) and LCR lows (magnum12s) (crossover.txt) https://sourceforge.net/p/equalizera...read/6630d140/

subsonic LR4 17hz on the subs (subsonic.txt)

hp LR4 70hz on SUR (surcross.txt)

delays on each channel with some basic math as a starting point then using the generated sign wave at crossover freq to adjust in REW with RTA for highest output (delays.txt)

level match with pink noise to each channel independently, -20db signal, with -10 volume output calibrated to 72db on all channels (levels.txt)

eq <-- this is where i'd love to use the filters, but for now i took the LCR highs measured together, did an auto eq in REW and use a single filter for LCR highs. reason for this was when i did each speaker independently, the sound just lost all of it's dynamics. Sounded dull and soft. perhaps i did something wrong who knows

then the rest of the includes are essentially the channel mapping back to the outputs, and since i have no dedicated SUB channel, the SUB output is added to each of the LCR low channels at a -4dB*SUB+Low

That said, could you walk me through how i would achieve replacing my EQ section with a rePhase convolution filtering? i used DRC designer, but that wanted me to have impulse responses for LR in stereo. i'd like to have a convolution filter for each channel if possible. all 8 if doable
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Old 2nd April 2017, 12:44 AM   #16
KaffiMann is online now KaffiMann  Norway
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Just got to say I moved over to just using Pedalboard with Engineers filter from Robin Schmidt
RS-MET

Been toying especially with the Elliptical filters, ridiculously sharp filters. Currently trying out 16 order elliptic with 0,1db ripple. It's very effective, trying to find a downside other than a few % more cpu usage.
Extremely simple setup, just "connect the dots", set the filters to whatever you want and just press play. I've spent so much time chasing around for a good solution, and it's been hiding under my nose. Just have to use the 32bit version of Pedalboard, and then it's all good.
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Old 11th April 2017, 06:47 AM   #17
KaffiMann is online now KaffiMann  Norway
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The Pedalboard + VST plugins is a much faster way to test filters and setup than using EQ Apo, the EQ Apo is probably superior in sound quality, at least when combined with RePhase. But Pedalboard and the various filters from Robin Schmidt is just really good for switching between setups, can have an array of different EQ and filter setups, with very few mouseclicks (4) I can change between whole setups of filter settings to see which I prefer. Also added 1 "global" EQ, as well as 1 for each channel.

So far my personal preference seems to be a mix consisting of 96db/oct LR at 104hz 48db/oct LR at 337hz and 12db/oct Bessel at 1157hz in my setup, currently looking for the right VST phase correction tool. It really is quite nice to have some buttons to tweak, even though they are on a screen. Feels like a more "hands on" approach than using REW, RePhase and EQ Apo. I guess that's the sum of it, people are different and have different preferences.

Last edited by KaffiMann; 11th April 2017 at 06:51 AM.
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Old 11th April 2017, 07:11 AM   #18
arcgotic is online now arcgotic  Romania
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You can also change in EQ Apo quickly if you edit config.txt file, just have in clipboard prepared different setup, change the file, save it, and instantly it is active configuration.
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Old 12th April 2017, 03:23 PM   #19
Boden is offline Boden  Netherlands
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Hello CabinetMakerRyan,

Maybe a stoopid qutsions, but player do you use? To my best of knowledge EqAPO does not contain a player for audio files, but maybe I am mistaken here.

Regards,

Eelco
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Old 12th April 2017, 03:24 PM   #20
Boden is offline Boden  Netherlands
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sorry, meant to say: what player do you use.
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