Software-based Audyssey DynamicEQ on Windows PC?

[vroad]

Audyssey-like Dynamic EQ without an AVR?

Hello everyone - in my first post here, I'd like to thank you all for this forum! My main listening space has a 2.1 setup with an Audyssey XT32 capable AVR. It does a real good job with bass management, and there is the bass-happy smile on my face :) regardless of which volume I'm listening at...

www.audiosciencereview.com

Something similar to DynamicEQ without AVR is already discussed here, but can I do something like DynamicEQ On Windows PC without buying an additional device? I'd like to enable the effect system wide, not just on music app.
I'm using KEF LSX II LT as computer speakers.

From what I understand DynamicEQ requires current speaker volume in main listening position in dB. Not sure if there is a way to do that accurately on KEF speakers and Windows PC.
There is a python library for obtaining current volume from KEF speakers, but KEF speakers' volume is expressed in value ranging from 0 to 100, not dB.
Equalizer APO reads its config file all the time, so if I could somehow periodically generate config based on current volume of the speakers I could make this work?

GitHub - N0ciple/pykefcontrol: Python library for controling KEF speakers

Python library for controling KEF speakers. Contribute to N0ciple/pykefcontrol development by creating an account on GitHub.

github.com

# Get volume : it reruns an integer between 0 and 100 my_speaker.volume # it is not a method so it does not require parenthesis # (output example) >>> 23

Equalizer APO, REW and Rephase WOW!

@33Polkhigh: Am I correct in understanding you use a HDMI multichannel receiver/AVR? Is that a simple as connecting the HDMI output of your PC/Laptop with the HDMI input of your 4.1( 5.1/7.1) receiver? (sounds almost too easy/too good to be true)

www.diyaudio.com

The editor is just an editor, and EQ APO is running in the background in Windows reading it's config from config.txt all the time.

 

[SirMaster]

DynamicEQ is just a fletcher-munson equal loudness curve and EqualizerAPO has this option built in.

So all you need to do is calibrate the levels correctly, and do you volume adjustment in EQ APO so that it adjusts the curve based on your chosen volume level.

On an AVR like a Denon, DynamicEQ is really meant for movies, or something that actually has a reference level volume. So the volume level you have the AVR set to below reference determines how strong the equal loudness curve is applied.

However, I assume using this on a PC you are using it more for music and or games? In this case, music and games don't really have a reference level, so there is not really a "right" amount of equal loudness curve to even apply.

Plus on a Denon, there is even the reference level offset setting which will then actually change the strength of the equal loudness curve being applied when using DynamicEQ.

Now there is a farther aspect of DynamicEQ and that is that it also boosts the surround and atmos channel volume levels, but I assume that's not a factor for your PC setup.

 

[ZolaIII]

EQ-APO & JRiver have ISO 226 2003. You do white noise (-20 dB true theoretical peak) calibration to 83~85 dB mono 86~88 stereo SPL (A wight) as max step (100) and enable it. Actual loudness will vary a bit in games/video depending on content normalisation and so on but not very much (if source ain't done horrible). You can adjust local sources using EBU R 128 and then compensate output +11 dB.
You can mimic equal loudness contours by simple self (low/high) PEQ filters, low self at Q 0.71 (Butterwort) 100~105 Hz (it's done the same way and with headphones/earphones) will be enough to let's say 60 dB SPL (A) and under that you will need a slight boost in highs (with self high filter of course). You adjust the filters in this case on flight to the readings from calibrated mic or loudness meter and towards graph of measured ISO 226 2003 JRiver values (posted numerous times on ASR). Will work fine on any speakers as long low bass boost isn't much, when it is isolation of it and it's transition range is more than recommend to be on sub's (high crossover...).

 

[vroad]

Thank you for the answers!

I've also found loudness control tool that works by updating EQ APO configuration in background. It might be possible to integrate with KEF control library above with some code.

My Custom Loudness Control Tools

Hello Audio Science Review Community, Today, I am excited to introduce projects I have been working on for two weeks: 'FIR-Filter-Maker-for-Equal-Loudness' and 'APO-Loudness'. These projects are in their early stages and are far from perfect, but they are crafted with my passion for audio and a...

www.audiosciencereview.com

However as SirMaster mentioned, since there is no single reference level that could be used for music and games, just switching between multiple EQ profiles could be good enough for my purpose.