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Hi, I think that it's possible that multiple factors are getting conflated here. I just came back from a performance at Symphony Hall in Boston (Vivaldi Four Seasons, also Piazzolla's Estaciones Porteñas). The stage is elevated, and I sat in the orchestra section (row S, if you're curious). I...

@j_j Also, mention in Stereophile @Jim Austin https://www.stereophile.com/content/assessing-sonic-illusions

Thank you--I was a little confused on this topic in your presentation, since the slide seemed relevant for a listener with their back to the rear wall, while your passing comment in the talk seemed to indicate what you were observing as the speaker facing the rear wall. I think I understand...

@j_j 1. You mentioned a codec issue where the same issue caused 70% to observe pre-echo (nearly all of the people who worked in studios) and 30% to observe messed-up imaging (those who have done a lot of work in live sound). Can you please comment further on characteristics of these groups? I...

For the curve for speakers in rooms, it was eleven listeners with three different music samples using one pair of speakers in one room

These links might be helpful: https://www.audiosciencereview.com/forum/index.php?threads/alternative-perspective-on-the-harman-loudspeaker-preference-curve.50602/page-3#post-1819700 and...

You should consider https://pureacouratesound.com/?fbclid=IwAR0YlOsneJAp8kR-YdHk6ePaU_WuOyDl9MarysnDZxK1K8Pq7-uC0rHNISc from @Joachim Gerhard, could possibly look into https://www.audiosciencereview.com/forum/index.php?threads/vera-audio-midrange-horn-polar-measurements.42732/ from @Bjorn ...

The time axis looks extremely linear with the same distance between 10-20 ms and 20-30 ms, so it would be quite remarkable to interpret the distance between the Y-axis line, which is not labelled as zero, and the 10 ms mark as compression. The graph is labelled as "direct sound," so it's not...

I wonder if this is quite a bit more complex than a simple tradeoff between "sharp imaging" (my words) or "definition" versus wide soundstage (increased ASW) and listener envelopment (LEV). Perhaps there are aspects of: Auditory envelopment (AE) related to ITD at low frequencies @Thomas Lund )...

Thanks for posting this! I wasn't aware that about these recordings or microphone, so I included the links for myself and other folks' reference. I did enjoy reading about the history behind another non-classical Blumlein technique recording...

The description of the microphone technique at https://tapeop.com/interviews/144/john-cuniberti/ reminded me of the Blumlein microphone technique, and indeed, the AEA R88 (https://aearibbonmics.com/products/r88-series/) is configured thusly. You can find more recordings at...

There was someone important in the field named Richard Heyser. You could get a sense of some of his contributions here: https://www.aes.org/technical/documents/openaccess/AES_TimeDelaySpectrometry.pdf

@j_j , if the middle ear has a first-order high-pass filter at around 700 Hz, would this filter introduce phase shift on the perception end, and if so, what would that mean on the reproduction end regarding phase of content below 700 Hz relative to content above 700 Hz? Sorry if this is a naive...

Interesting notes on the types of recordings--I wonder if certain techniques like Blumlein or the typical approach of certain labels like Yarlung might be more conducive to this effect. Yes, there's certainly the visual aspect in directing attention, but also the problem of presenting diffuse...

Yes, this was my point I was trying to make. A stereo subwoofer setup along the lines of what I described will still get mono much of the time, as in pop music and home theater LFE, so one can set up stereo subwoofers but still get the benefits of Welti's approach whenever the bass content is...

Your article was dated 2020 on the Audioholics website. The referenced material was 2005-2008. 1. One mid-wall subwoofer on the left wall, one mid-wall subwoofer on the right wall. This is consistent with Welti's approach from both of his papers, as previously noted. 2. In the quote below, you...

That's so interesting! So from the above, it sounds like your listening room is square 10.67'x10.67' with four subwoofers, only about 3' or so from the central listening position to each subwoofer driver. How do you have your speakers positioned? It would be great to see a setup diagram and some...

@goryu 's situation is rather more complicated, so I replied to him directly, but in essence the front and rear wall IB subwoofers would not be really stereo but mono (though in theory could set up as bass array or souce-sink), so could potentially (depending on specifics such as room...

Yes, the something else at play is the concept of standing waves or modes. It will be helpful if you read this: https://www.harman.com/documents/LoudspeakersandRoomsPt3_0.pdf

I've come up with a new term: Harmansplaining Things like https://www.avsforum.com/threads/localizability-of-bass-frequencies-in-rooms.3205312/ as opposed to https://www.audiosciencereview.com/forum/index.php?threads/bass-and-subwoofers.51589/#post-1857133, or...