Roon & Home Audio Fidelity (Room Correction / convolution filter creation)


You’re right, of course, @hwz1970. But YOUR acoustically tuned listening room looks absolutely stunning. Congrats!


Your listening room is the only one I’ve seen that looked really good to me (instead of awful and without any atmosphere)! I could live there… probably with some windows, but I guess that would destroy the entire effect of your careful design :wink:

That’s why I would love to be able to have some software do the math instead. Of course realising, it will never 100% approach a room like yours. That’s okay. But as it currently works with me, it doesn’t work for me. Yet. :slight_smile:

(Magnus) #349

Room treatment is definitely the best option, but unless you build the room for audio from the ground up (double walls, slanted roof, etc) you are not going to get it 100% perfect. In fact, even then there are likely some improvements to be made.

A typical setup scenario would be something like this

  1. Setup the speakers as good as possible (lots of guides on the net for this).
  2. Treat the room as much as possible (or as much as the wife allows you to), of until you feel it can’t be improved any more.
  3. Fix the fine-tuning (including a house curve you like) with digital room correction.

Of course, only do this if you want a neutral “correct” sound, if you are happy with what you have now, go away from this thread and listen to music instead :slight_smile:

(Mark Allen) #350

FWIW the biggest difference for me when I took my measurements was to use a proper microphone stand and point the mic towards the ceiling. Again everyones room/equipment is different. I wish you luck

(Larry Megugorac) #351


Thanks for pointing out this site. Their products look great and reasonably priced…even has artwork…what’s not to like? I have a 75" screen between my speakers and always assumed that the REW measurements and Theiry’s filters took that reflection into consideration…but what the hell do I know…

Thanks again!

(Larry Post) #352

You’re welcome. The measurements and filters do take the reflection into account but there’s only so much one can do in software. Attenuating the energy is much more effective, then create the filters for the last bit of fine tuning or to compensate where you can’t easily treat like the ceiling and floor.

(Mark Allen) #353

Nice article about Home Audio Fidelity filters:

(Magnus) #354

@extracampine lets continue here so we don’t steal the other thread.

Another option is to try the stuff discussed in this thread. Do measurements in REW and send to Thierry at


Updated my DAC a few weeks back and have updated the filters accordingly. Also decided to give the crosstalk reduction another go - I’ve been blown away by what this can achieve on some recordings. Stringed instruments and percussion sound so much more realistic - by comparison the ‘normal’ sound just feels very unfocused. To my ears and in my setup the filters definitely give the best HiFi ‘bang for buck’ that I’ve had.

(Magnus) #357

I find xtalk to make instrument position more precise, but it also makes the sound stay between the speakers so a more narrow soundstage. Not sure what I prefer.


My assumption, based on limited knowledge, is that the nature of the effect probably depends quite a bit on the room, speaker positioning and equipment - in fairness I don’t get a very wide or deep soundstage at the best of times so don’t notice any reduction there - if anything it’s perhaps wider. Like you, though, I do notice instrument positioning as more precise.

(S Dolezalek) #359

Magnus: You raise an interesting question for those of us whose rooms dictate rather wider speaker configurations. I wonder whether Thierry’s crosstalk reduction makes even more sense in those situations because we are already starting with a very wide sound stage (for example I have 25 feet between my front speakers)?

(Magnus) #360

Perhaps, but as always the only way to know is to test in your system and room. I am using xtalk now as well, the improvements outweigh the slightly smaller (but more homogeneous) stereo image.

(Johan) #361

With crosstalk reduction, I have a much wider stereo image and it’s more focused, but it also dempends on the recording.

(Rémi) #362

Same for me, wider image and more precise with crosstalk, esp. on acoustic « simple » recordings. Bill Evans / live at Village Vanguard is gorgeous, feels like beeing at the club!

(Mark Allen) #363

It’s my go to recording for time-travel. lol. It really does feel like you’re there.

(Johan) #364

Today, after a very long time I was listening Roger Waters’ Amused To Death… with HAF filter and crosstalk reduction on. To my surprise it sounds completely out of phase! Gone is the Q sound. Turning the HAF filter off and the Q sound stereo field is back…
Can someone try this and see if the same happens with Q sound recordings with your own HAF filter?


I was reading the requirements page on their website and they talk about moving the mic to the ‘next position’. I had a look through all the material and couldn’t find any mention of the positions for the recordings, can any enlighten me? Thank you.

I have the mic now and I have been mucking around with REW, thanks to @Magnus, and I am considering giving these guys a go.

(Rémi) #366

See here at the beginning of the page


@Ross_Hamilton as well as that link by @alec_eiffel there’s a diagram from @Magnus which is what I’ve always used - .

Edit: There’s also a brilliant HowTo by @alec_eiffel - Roon & Home Audio Fidelity (Room Correction / convolution filter creation) (unless you’re using Thierry’s own tools).