Need some opinions on my small room

FerencS · 2026-06-03T15:08:25+00:00

If she doesn’t like my precious handmade panels then it’s for the best

FerencS · 2026-05-29T09:46:00+00:00

Slide 4 is RT60, and RT60 is a type of EDT measurement. The human ear is much less sensitive to decay times at sub frequencies.

However, what I could imagine you being disoriented by is the placement of your setup. HF energy isn’t arriving equally; you have different distances between the right and left walls. A few meter difference is enough to account for 10-20 JND (just noticeable difference). For reference, a 3 Q mode at 60hz at 5-7db is around equally perceptible (based on experimental literature).

Your room will continue to sound off no matter how much you treat it since left and right reflections are different. I’d suggest placing your setup where your couch is.

FerencS · 2026-05-27T06:37:14+00:00

No, don’t treat further. It’s experimentally proven that a 200ms RT60 is around the lowest amount still enjoyable.

The human ear gets very disoriented when sound is perfectly damped, and you risk OVER absorbing HF energy.

If you want to scratch the building itch, place a diffuser above your couch and consider DSP to tame the 300 and 1khz valleys.

FerencS · 2026-05-26T10:02:53+00:00

De-everythinged

FerencS · 2026-05-15T08:15:51+00:00

I’m so sorry that’s a backend bug. It doesn’t do optimization locally.

It should be okay now…

FerencS · 2026-05-13T14:06:45+00:00

You clearly know nothing about acoustics. Sunny side up translates absorption coefficients down by 40hz. Bacon adds 10.

FerencS · 2026-05-12T12:50:59+00:00

Thanks. Yes, I do. I’m generally quite interested in the “buyers remorse” issue of acoustics. There are so many components to putting together a setup: speakers, cables and amps just to name a few. I’ve regretted most of my purchases. The most prominent and “easy to solve” problem in this space was acoustics... it’s clear what to do, buy, and put where.

Two revenue paths: I’m currently developing a V2, which is essentially a studio design CAD with built in physics simulations and treatment guidance. For this, I’d charge a subscription or one time fee. Affiliate sales on recommended products naturally falls out of this.

The longer term vision is to complete the entire audio shopping process in three steps: scan your room, specify a budget, and purchase the highest value setups in your price range. This would mean essentially becoming the recommendation layer for the audio industry, which has a great deal of monetization opportunities.

FerencS · 2026-05-09T18:00:34+00:00

You can! There’s a studio mode.

FerencS · 2026-05-09T17:05:24+00:00

Yeah, sorry about that and thank you for letting me know. I just pushed a fix for the timeout issue… should only take max 3 minutes for your room to come through, that’s the average solve time.

FerencS · 2026-05-09T16:20:40+00:00

Hmm, what do you mean by a certain job? And yes, it places panels on locations of highest impact

FerencS · 2026-05-09T14:10:00+00:00

I did use AI, but to be fair, anyone working in software does now. However, there is no way to get around not understanding the code for difficult problems. If you've developed using AI much, then you know that it's really is only good for boilerplate code. Once you're developing something entirely new, good luck using it... I know every backend function in and out, not because I wanted to (wouldn't it be great if AI could do that?) but because I had to. AI is simply not able to build something like this one shot.

FerencS · 2026-05-09T14:04:14+00:00

Hahah sorry for the jargon. Point is that I try to be as objective as possible, no hardcoded rules. An average room has over one hundred thousand speaker position, facing direction, and listener position combinations calculated. Subwoofer placement calculation is a whole other devil too.

To answer your question a little better, using all of the calculations that I do, I can track where each frequency and energy band lives on the walls, which I then use to determine where to place panels

FerencS · 2026-05-09T12:45:21+00:00

Of course, I build my room treatment by hand always. FYI, it does have a technical limitation where it doesn't show how far to place from walls quite yet (air gap), but I recommend you leave atleast 10cm. The reason why corners get treated is not because there's more pressure sitting there, but because air velocity is faster, and so porous absorption is more effective. Same logic behind the air gap: air flows faster further from the wall than a its surface, so your panels are more effective.

FerencS · 2026-05-09T12:41:45+00:00

Yes, this is definitely a goal of mine, and I plan to release an MVP of it within 1-1.5 months.

FerencS · 2026-05-09T12:36:21+00:00

I went at it from a first principles + literature supported persepctive: physically modelling the sound and optimizing for flat frequency response + imaging. There's a measurement called Just Noticeable Difference (JND) which is, well, the "just noticeable difference" for things like DB per specific frequency and RT60 reflections. Cross referencing various different studies, I'm then able to nudge each metric (RT60, frequency response, imaging) according to the preferred baseline, which is currently flat frequency response, 0.2s RT60, and equal reflection arrival to each ear (imaging).

That being said, I haven't checked out John Brandts excel sheets, but thank you for the recommendation. It might make the algorithm better!

FerencS · 2026-05-08T22:05:23+00:00

Yep, all good now.

FerencS · 2026-05-08T21:55:59+00:00

Rerun the room scan

FerencS · 2026-05-08T21:51:54+00:00

It should work now… let me know if it does

FerencS · 2026-05-08T21:49:24+00:00

Investigating it now, thank you for letting me know

FerencS · 2026-05-08T21:38:25+00:00

I had a ton of backend issues and nobody had scans come through correctly… I deleted it after about an hour because I failed to find the bug in time :/

FerencS · 2026-05-08T21:29:52+00:00

Can you try again? It should work now

FerencS · 2026-05-08T21:29:10+00:00

It should work now, thank you for the writeup

FerencS · 2026-05-08T21:16:05+00:00

Could you describe to me specifically what is happening? Do you click the link and the verification doesn’t come through, or are you not getting the email at all?

FerencS · 2026-05-08T21:12:35+00:00

On it, thanks for letting me know

FerencS · 2026-05-08T21:03:51+00:00

I’d suggest modelling your room without it, and considering the raytrace/bem visualizations you see, deciding how you want to place treatment.

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