The Advantages of Floor Coupled Up-Firing Speakers

Hello Key,

How does your system differs from Gerzon's Ambisonics?
Ambisonics - Wikipedia, the free encyclopedia
Ambisonic.Net - where surround-sound comes to life

- Elias

The first public stereo performance used more than 2 speakers. Stereo is limited to 2 transmission channels but it has never been limited to 2 playback channels. There is no standard for "Stereo" yet. There never has been a concrete standard for stereo as far as I know. That is what we are trying to find here right? Then we must explore all of the options and not let the tail wag the dog.



Okay I drew out some subjective impressions of Stereophony on paper a while back and redid them on the computer to make them more clear.

An externally hosted image should be here but it was not working when we last tested it.


I was being sort of nice with that picture and trying to encompass all different flavors of speakers. But with a poor speaker generally the imaging will be limited to in between the triangles. Even with a great speaker conventional mastering and mixing tends to limit the imaging within that triangle even though it can be stretched out to 180 degrees of coverage. There are products that make use of this illusion and get there in different ways. The depth coverage is not limited to the colored area but that is the area where I perceive things as being "full bandwidth". Anything pushed back in depth further than that area generally will not sound like a pop record (where the overall instruments end up in a balance resembling pink noise) but will have less high end and not as an extreme bass. Localization in front of the speakers themselves is very rare but can happen. And I pretty much only limited my examples to the ones that actually work the best - equal spacing. My anecdotal findings are consistent with Wendy Carlos in regards to speaker placement and hollow spots in the coverage.
Wendy Carlos Surround1





More than one way to end up at the same location. And yeah I wasn't exactly directing it at non conventional speakers where the image is already extended. And this is one of the reasons I was telling him maybe the studios should have kept the flooders.
 
from my perspective there is one principal problem with those interesting concepts, the same problem as with ambiophonics
they seem to offer various alternatives of the audiophile chamber, that is an exclusively dedicated listening room for ultimate satisfaction of single listener or perhaps a couple, seated in a very precise spot

Generally the impression from a distance is remarkably the same as sitting close. It's like the subjective reviews you read about Geddes' and Linkwitz's speakers where the tonality barely shifts except it's wider and more obvious. You get a "super stereo" effect from a distance but it is really strange when you get up from the normal listening spot after a while and walk away with a song playing. You can get up turn around and walk around the corner and the tonality doesn't shift.

is this hexaphonic less impractical than ambiophonics? what are its sonic advantages in comparison to ambiophonics?

Hmm less impractical? Generally I think hexaphonic or any rear speakers are going to be for perfectionists or mixers. Quad is plenty to immerse most any casual listener. If you start to pick it apart too much or see through the illusion then adding a fifth channel or a sixth will help. But the improvement is not that great like moving from mono to stereo or stereo to quad. Sonic advantages would be that it actually works, isn't colored, and is backwards compatible with normal stereo.



I haven't but I always had sympathy for the idea, at least it was not computer audio and they recommended using speakers with beautiful Bandor drivers

Well it's possible to make an analog version but I just prefer a computer.

So your "system" processes stereo into 6 separate channels? Something like Dolby Pro Logic II. I still don't understand why anybody would want to have that these days. Surround sound gives much better directional control over the sound field.

Does it? I mean I'm sure it measures all nice and pretty but does it really give you better control? or are you just guessing here?
 
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Surround sound gives much better directional control over the sound field.
If you mean that five-channel stuff: Many music producers are not happy with it and leave the center channel away. Some lables (among them Chesky records) once considered rebelling against 5.1.and wanted to establisch a hexaphonic setup, just not exacly 6 x 60° like Key.

Key, maybe you want to try a 2+2+2 recording from the MDG:
MDG-Musikproduktion Dabringhaus und Grimm
Here you can see what the setup looks like:
Neue Seite 1
 
Generally the impression from a distance is remarkably the same as sitting close.
(...)
You get a "super stereo" effect from a distance but it is really strange when you get up from the normal listening spot after a while and walk away with a song playing. You can get up turn around and walk around the corner and the tonality doesn't shift.
(...)
Hmm less impractical?

You mean the distance from the front speakers?

is it necessary for the listener to be seated somewhere along an axis of symmetry of the setup?
how much off center can the listener move?

I understand that one can walk around and the tonality doesn't shift but what about imaging? Do the images shift?

This would be impractical in the first place (not to mention necessity of putting six speakers in the specific locations in the room and of all those wires around)

with the single driver flooder imaging is stable and robust, You can walk around and images stay in their virtual places, no images shift occurs

no tonality shift can be achieved even with non-coincident two-way flooder as Elias' test has shown

best,
graaf
 
Hello,

I've been listening for a few hours with the 2-way monopole in ceiling firing arrangement. The box is placed beside a wall on the floor and I'm listening at 2 to 5 meters distance.

Again this was a MONO setup with one speaker.

thanks for the post Elias :)

50 such posts instead of 500 go-read-the-books posts and this would be a great thread

best,
graaf
 
Hi,

BTW has anyone got a chance to listen to Dynavector Superstereo?
DYNAVECTOR SuperStereo Adapter DV ADP-3

I haven't but I always had sympathy for the idea, at least it was not computer audio and they recommended using speakers with beautiful Bandor drivers

I heard the demo on several occasions.

The best I can say is that they reminded me of "pure frontal" versions of "pseudo quadro" I heard in the early 80's and the better version of "pro logic stereo" processed music, which is to say I too no great offence but preferred the presentation with the reverb effect system off.

I find the whole thread quite facinating.

I can symphasise with the "no sweet spot" results of Omni's and related concepts that propagate sound mostly indirectly and through often many reflections for the consistent and even tonality they provide and the lack of a sweet spot.

Yet even as someone who does not venerate the artificial idol and totem of soundstaging and 3d soundscaping etc. as much as the average audiophile, if I find their imaging by far too diffuse and imprecise to be a reasonable representation of musical reality, unless we are talking listening outside the actual concert hall, through a window into my smaller living room.

Of course, this is my personal preference and what happens when I listen to such systems and WHY they fail to prompt the "suspension of disbelief" in my case AT ALL.

While on the other hand systems that are highly directional and offer reasonable even directivity (the two are not identical) all do it to some degree for me and the ones where the controlled directivity extends across a sufficiently wide bandwidth do it with surprising consistency even across different styles of music.

To be the subjective removal of walls afforded by sufficiently directional systems helps to transport me into the performance venue (even if the venue is virtual) and out of my living/listening room. To me this "does it".

Yet I can perfectly "see" and accept preferences to the opposite, for reproduction, even if they lack any semblance to the "gestalt" of the performance supposedly being experienced.

In the end it matters that whoever is listening enjoys the music and the sound of the system, if not, there is no point having it, no matter what reams of research papers say.

It may best not to elevate such personal preference (be it either the one for highly directional systems, for highly diffuse systems or indeed for the common midway approach between the extremes) to a religion and to proselytise for converts...

Ciao T
 
I find their imaging by far too diffuse and imprecise to be a reasonable representation of musical reality

perhaps You would not find the flooder imaging "far too diffuse and imprecise"
it is not omni strictly speaking

To be the subjective removal of walls

I experience disappearing walls with the flooder

if not, there is no point having it, no matter what reams of research papers say.

yes, very true

It may best not to elevate such personal preference (be it either the one for highly directional systems, for highly diffuse systems or indeed for the common midway approach between the extremes) to a religion and to proselytise for converts...

yes, I can see some form of religion here in this thread, religion of the book or rather books

good and right books by righteous orthodox authors because there are also wrong books by wrong authors (audiophools proposing crazy schemes) like "Total Recording" or "Art of Sound Reproduction"...

best,
graaf
 
Hi,

perhaps You would not find the flooder imaging "far too diffuse and imprecise" it is not omni strictly speaking

I think I messed (in a 2nd hand hifi shop) with Carlsons long before their 2nd coming (in the early 90's). And my judgement was "diffuse and imprecise". Oh, and "no bass" and a long list of other complaints and I remember a complete bewilderment as to how anyone could get basic acoustics so messed up as to actually design something like that... :)

Remember, I come from a studio background... My first "High End" System I ever heard was a Studio Setup.

And I have on quite a few occasion had the chance to walk from the control booth into the concert hall.

As said, I do not care how you listen to it, but I can tell me if you where to put on one of my old minimalistic recordings (who knows where they ended up after 1989 - probably in a landfill) and replay it with ceiling flooders it would sound nothing like what I recorded or what I heard in the control room, while what I heard in the control room bore at least a more than passing semblance to what I heard in the hall.

Of course, if you like what you hear with ceiling flooders much better, that what you'd hear in the control room or the concert hall, who am I to gainsay you?

I experience disappearing walls with the flooder

Let me perhaps be absolutely clear what I mean with "disappearing walls".

It means (assuming the recordings allow this of course) essentially to be transported into a clearly much larger and different acoustic space, much more in line with (say) a large Chapel or a Church or indeed a large concert hall.

For example, the different acoustics of the Royal Festival Hall and the Barbican (both in London - the Barbican with it's horrible acoustics regularly in use for Tony Faulkners "High End" recordings of LSO - the RFH a much favoured haunt of mine to enjoy concerts) on minimalistic recordings become quite clear, though it does not quite extent to full 3d sonic hologaphy.

Is that what you experience through ceiling flooders? The replacing, to a substantial degree, of the listening space by larger and often identifiable performance spaces?

yes, I can see some form of religion here in this thread, religion of the book or rather books

Actually, I am getting more of a feel of the second coming of the Prophet Zarquon or Carlsson or whatever his Naim be... Again, it seems to be a question of viewpoint.

Ciao T
 
I think I messed (in a 2nd hand hifi shop) with Carlsons long before their 2nd coming (in the early 90's). And my judgement was "diffuse and imprecise". Oh, and "no bass" and a long list of other complaints and I remember a complete bewilderment as to how anyone could get basic acoustics so messed up as to actually design something like that... :)
Ciao T

You mean the Sonabs?
I don't know them and so I can't say anything about them. When I say Carlssons I only mean those of the "second coming" sold under the Carlsson label, but strictly speaking I don't know them either, just my clones.
 
Hi,

As said, I do not care how you listen to it, but I can tell me if you where to put on one of my old minimalistic recordings (who knows where they ended up after 1989 - probably in a landfill) and replay it with ceiling flooders it would sound nothing like what I recorded or what I heard in the control room, while what I heard in the control room bore at least a more than passing semblance to what I heard in the hall.

As I said earlier I find that the biggest advantage of the pure flooder in contrast to my "2nd coming Carlsson" clones and conventional speakers is adding some "acousticness" to poorly done studio recordings. If they managed to add nothing to real acoustic recordings this would be kind of magic.

About the 2nd generation Carlssons:
What they - in contrast to conventional speakers in a conventional setup don't add (or at least to a smaller extent) is floor- and front-wall reflections. Just if someone tried to reduce them to something that has stronger-than-usual ceiling reflection.
 
Sure it does because you have to guess about a soundfield's directional characteristics when deriving additional channels from a 2 channel stereo signal. Multichannel signals are (or can be) truely directional.

Okay let me see if I can explain what the advantages are to my system so you get it. Let me just give a simple answer to the discrete surround sound thing - every discrete surround sound mixer I have met will use a decoder in a pinch. Sometime the decoder just does things the mixer can not do. But this isn't so much where I see a decoder helping.

When you mix a song it seems to me that there is a certain goal for "subjective constancy" if you know it or not. Many engineers might not know the specific scientific name for what they are trying to do but never the less they understand exactly how to make the mix stay roughly the same under vastly varying physical conditions - very different rooms and playback systems.

If you track in stereo using my system or one that is equivilent I know from experience that the end result will be much better. It gives you a very clear window to look into the mix at. Can you do the same thing with normal stereo? Yes, some are VERY skilled at being able to hear the actual mix through inferior playback equitment. If you can mix a subjectively constant mix on a set of NS-10s to me it's like painting a picture with an eye patch on one eye and a catarack on the other. Can you do it? Yes, but it's not the easiest way to do it.

You might think I am selling a magic bullet here but it's still not going to make a bad mixer good - it'll just let them hear first hand how bad they are. But basically if you make a mix and it sounds awesome in Hex, Quad, Stereo, that weird Q-Soundesque simulated surround in stereo, and mono the mix will translate to most any system. Wanna take a guess what album was mixed using a very similar setup?
 
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Hi,

You mean the Sonabs?

Yes. I also came across the later ones. But I never really extensively played with them.

I notice that in the 60's to 70's there was a craze for more or less omnidirectional speakers (including Amar Bose's Ball and the Grundig spherical speakers, JBL Aquarius and so on).

I suspect the Carlsson designs derive from this IMNSHO misguided craze.

Ciao T
 
Hi,

As I said earlier I find that the biggest advantage of the pure flooder in contrast to my "2nd coming Carlsson" clones and conventional speakers is adding some "acousticness" to poorly done studio recordings.

Would not perchance using a Lexicon reverb or maybe an Eventide (or just the latest waves reverb plugin in you PC Playback Software) used in the signal path for such recordings only be a better choice than making a speaker system specifically for these issues?

Unless such recordings make up most of ones listening of course or one has the space and budget for many top notch speakers of fundamentally different acoustic structure/dispersion/directivity of course.

Ciao T
 
Okay let me see if I can explain what the advantages are to my system so you get it.

Sorry Key, I still don't get it. If the music industry doesn't want to use a new standard that is already adopted by a lot of consumers then that's ok with me. But proposing an alternative standard that allows only inferior control of the sound field and uses as many additional loudspeakers as the existing standard doesn't make any sense to me.