Skip to main content ↑ ↓

Notice

Please note that most of the software linked on this forum is likely to be safe to use. If you are unsure, feel free to ask in the relevant topics, or send a private message to an administrator or moderator. To help curb the problems of false positives, or in the event that you do find actual malware, you can contribute through the article linked here.
Topic: "Room Correction", "Target curves" 2019 (Read 1849 times) previous topic - next topic
0 Members and 1 Guest are viewing this topic.

"Room Correction", "Target curves" 2019

Much like the "Room Treatments" thread . it seems a day doesn't go by where someone is advocating for "Room Correction" as a mandatory elixir.
Of all ironies, quite often this Olive paper discussed here in 2009 is cited as evidence of a mythical "Target curve" to be "corrected to", that is preferred by listeners...and thus you.
An example of such a discussion can be found in Archimagos latest blog http://archimago.blogspot.com/2019/10/2019-update-basic-acourate-dsp-room.html, A full ranged "correction" product by Acourate is used on his Paradigm S8v3 speakers. NRC measurements of an earlier version can be found here https://www.soundstagenetwork.com/measurements/paradigm_signature_s8/
Unfortunately, it is unknown how much difference there is between versions, but the anechoic data on the V1 shows a well behaved on/off axis, as found to be preferred in Harmans listening tests. Exactly the type of speaker that both Toole and Olive advise not to "correct", with the exception of <500hz where the room dominates.
Tooles paper on so called "Room correction" http://www.aes.org/e-lib/browse.cfm?elib=17839
He refers to the belief in such audiophile/studiophile folklore as "An enticing marketing story"  ;) .
But that has never been a deterent to belief and misunderstanding. Despite what Dr Olive actuallly says, the averaged "corrected" curve from his 2009 study is cited as the holy grail of preference by listeners.
From his comments below the article http://seanolive.blogspot.com/2009/11/subjective-and-objective-evaluation-of.html:
Quote
Dr. Sean OliveNovember 2, 2009 at 10:33 AM

In truth, the optimal in-room target curve may depend on the loudspeaker directivity and reflectivity of the listening room. If the room is acoustically dead with few reflections and/or the directivity of the loudspeaker is quite high, the in-room response will represent a higher proportion of the direct sound, which should be flat. Using a target curve with large downward tilt will make the loudspeaker sound too dull.

Quote
Dr. Sean OliveApril 20, 2010 at 5:41 PM
Finally, if you own Revel Salons, they don't need any equalization except below 300 Hz where the room dominates what you hear :) If you own good loudspeakers, you should focus on correcting the low frequency acoustical interactions between the loudspeaker and room.

Here is an example of a Salon measured in room, with a believer "Target Curve" -10db 20-20khz superimposed

Unless one is blind, to match that "target", the bass would have to be boosted significantly (near +5db @ 30hz) and several cuts made >1k to "flatten" the elixir curve...thereby mangling the blind listening test winning Salons on and off axis response.
The same would be true for any well engineered speaker, like the V1 Paradigm S8.
That's never stopped folks before though, as beliefs in folklore are persistent.

cheers,

AJ




Loudspeaker manufacturer

Re: "Room Correction", "Target curves" 2019

Reply #1 –
Unfortunately, you persist with just. Not. Getting. It.

When I (and others) talk about room EQ, we mean for low frequencies. Call it "bass EQ" if you must.

That is all I will say on this, so can it with the snark.

Re: "Room Correction", "Target curves" 2019

Reply #2 –
Quote from: KozmoNaut on
So in the context of real-world rooms, I would go with two (or four) capable and well-placed subwoofers, some room treatments as necessary and room correction.

Quote from: KozmoNaut on
Unfortunately, you persist with just. Not. Getting. It.
When I (and others) talk about room EQ, we mean for low frequencies. Call it "bass EQ" if you must.
Nice edit this morning. I saw the original, pre-revisionist history.  ;)
You don't speak for others either, just yourself. The Archimago blog linked clearly indicates otherwise when talking about "room eq" and "target curves" et al.
Unfortunately, those sort of beliefs in audio are endemic, as the Toole AES presentation indicated.
Loudspeaker manufacturer