[Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-08 Thread Bearcat M. Şandor
Folks, I've been reading up on the various proposals for 3D sound from a set of stereo speakers. The 3D Audio Alliance is working on such a system. Astound Surround is getting ready to market, Edward Choueiri is working on the same idea (see: http://www.studio360.org/2011/apr/29/adventures-3d-soun

[Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-24 Thread Richard Lee
There's loadsa good stuff being discussed here. If I can comment on just one or two > When listening to this through a speaker rig, we hear this boost and tend to interpret it as meaning the sound is close especially in a dry acoustic with a Greene-Lee head brace etc., etc.,. However, sur

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-08 Thread Neil Waterman
My personal opinion: a) 3D sound from 2 speakers Rubbish. Unless energy is arriving from the general direction of the supposed source, the best any system can do is present some psycho-acoustically confusing cues that attempt to fool the brain, but sadly (for the 2-channel snake-oil folk) the

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-08 Thread Fons Adriaensen
On Fri, Jul 08, 2011 at 02:19:15PM -0400, Neil Waterman wrote: > My personal opinion: > > a) 3D sound from 2 speakers > Rubbish. Unless energy is arriving from the general direction of the supposed > source, the best any system can do is present some psycho-acoustically > confusing cues that

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-08 Thread dw
On 08/07/2011 19:09, "Bearcat M. Şandor" wrote: Folks, I've been reading up on the various proposals for 3D sound from a set of stereo speakers. The 3D Audio Alliance is working on such a system. Astound Surround is getting ready to market, Edward Choueiri is working on the same idea (see: http:

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-08 Thread Bearcat M. Sandor
On 7/8/2011 12:41 PM, Fons Adriaensen wrote: On Fri, Jul 08, 2011 at 02:19:15PM -0400, Neil Waterman wrote: My personal opinion: a) 3D sound from 2 speakers Rubbish. Unless energy is arriving from the general direction of the supposed source, the best any system can do is present some psycho-

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-08 Thread Fons Adriaensen
On Fri, Jul 08, 2011 at 02:06:37PM -0600, Bearcat M. Sandor wrote: > The ear canal is just a tube, so there's no > directionality once the waves are in there. "Once they are in there". Which is why you can make things work with headphones plus head motion tracking. When using speakers, the so

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-08 Thread Bearcat M. Sandor
On 7/8/2011 2:40 PM, Fons Adriaensen wrote: On Fri, Jul 08, 2011 at 02:06:37PM -0600, Bearcat M. Sandor wrote: The ear canal is just a tube, so there's no directionality once the waves are in there. "Once they are in there". Which is why you can make things work with headphones plus head mot

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-08 Thread dw
On 08/07/2011 21:40, Fons Adriaensen wrote: On Fri, Jul 08, 2011 at 02:06:37PM -0600, Bearcat M. Sandor wrote: The ear canal is just a tube, so there's no directionality once the waves are in there. "Once they are in there". Which is why you can make things work with headphones plus head mot

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-08 Thread Robert Greene
I think one has to distinguish here various factors. First of all, if one subtracts the effects of head movements on perception and also assumes that the listener is willing to keep their head absolutely still, then there would seem to be no problem with producing any sound one cared to at the en

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-08 Thread Fons Adriaensen
On Fri, Jul 08, 2011 at 09:53:31PM +0100, dw wrote: > One would never be able to locate the source of a gun shot then, since > you don't have time to sample the soundfield. In anechoic conditions the direction of such a sound could be ambiguous, apart from pinna coloration if there is enough HF

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-08 Thread Stefan Schreiber
Robert Greene wrote: I think one has to distinguish here various factors. First of all, if one subtracts the effects of head movements on perception and also assumes that the listener is willing to keep their head absolutely still, then there would seem to be no problem with producing any sound

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-08 Thread Stefan Schreiber
http://www.studio360.org/2011/apr/29/adventures-3d-sound/ "Video: The Science behind 3D sound" Here, the demonstration works, but this is "180º horizontal surround". Or should we call this "wide-stereo"? The recording might be (technically) a binaural recording (actually, it is :-) ), but th

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-08 Thread dw
On 08/07/2011 22:48, Fons Adriaensen wrote: On Fri, Jul 08, 2011 at 09:53:31PM +0100, dw wrote: One would never be able to locate the source of a gun shot then, since you don't have time to sample the soundfield. In anechoic conditions the direction of such a sound could be ambiguous, apart fr

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-08 Thread Fons Adriaensen
On Fri, Jul 08, 2011 at 11:34:18PM +0100, dw wrote: > 60 degrees seems excessive head movement for someone seated listening to > speakers.. Why ? It's a natural thing to do if there is any significant sound from that direction. Why should being listening to speakers make any difference ? I lik

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-09 Thread David Worrall
[Hello to all - It was good 2 C some of you at ICAD Budapest - and +ve 2 C a deal of activity in ambisonics for auditory design.] On 09/07/2011, at 6:40 AM, Fons Adriaensen wrote: > On Fri, Jul 08, 2011 at 02:06:37PM -0600, Bearcat M. Sandor wrote: > >> The ear canal is just a tube, so there's

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-09 Thread Marc Lavallée
Fons Adriaensen a écrit : > And *if* I turn my head, for whatever reason, and the illusion > collapses, I'm not impressed... I just tried turning my head while listening to XTC. I can turn it more than 45 degrees in both directions without destroying the stereo image. So if turning the head is p

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-09 Thread dw
On 09/07/2011 18:07, Marc Lavallée wrote: Fons Adriaensen a écrit : And *if* I turn my head, for whatever reason, and the illusion collapses, I'm not impressed... I just tried turning my head while listening to XTC. I can turn it more than 45 degrees in both directions without destroying the

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-09 Thread Neil Waterman
ML: "Maybe it can; is there a way to "up convert" non-ambisonics recordings to horizontal ambisonics?" If you down sample a 48kHz recording to 16kHz what happens? All the audio information above 8kHz is lost right? If you up convert back to 48kHz can you recover the bandwidth lost? No. You ju

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-09 Thread Marc Lavallée
Neil, I used the wrong words. Please excuse my "up-converting" nonsense, and let me ask again. The perceived "directional bandwidth" of stereo recordings is better than what conventional stereo (with cross-talk) can reproduce. So, is it possible to adapt a stereo recording to play on a horizon

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-09 Thread Paul Hodges
--On 09 July 2011 14:04 -0400 Marc Lavallée wrote: So, is it possible to adapt a stereo recording to play on a horizontal ambisonics system, in order to get a better stereo image than with conventional stereo? A kind of "restored stereo" experience that ambisonics can provide because of its dir

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-09 Thread Fons Adriaensen
On Sat, Jul 09, 2011 at 02:04:21PM -0400, Marc Lavallée wrote: > The perceived "directional bandwidth" of stereo recordings is better > than what conventional stereo (with cross-talk) can reproduce. This is again a game of words. Most stereo recordings are made to be reproduced by two speakers

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-09 Thread Stefan Schreiber
Fons Adriaensen wrote: On Sat, Jul 09, 2011 at 02:04:21PM -0400, Marc Lavallée wrote: The perceived "directional bandwidth" of stereo recordings is better than what conventional stereo (with cross-talk) can reproduce. This is again a game of words. Most stereo recordings are made t

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-09 Thread Fons Adriaensen
On Sat, Jul 09, 2011 at 09:19:07PM +0100, Stefan Schreiber wrote: > Fons Adriaensen wrote: > >> On Sat, Jul 09, 2011 at 02:04:21PM -0400, Marc Lavallée wrote: >> >>> The perceived "directional bandwidth" of stereo recordings is better >>> than what conventional stereo (with cross-talk) can reprodu

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-09 Thread Jörn Nettingsmeier
On 07/09/2011 10:19 PM, Stefan Schreiber wrote: Fons Adriaensen wrote: On Sat, Jul 09, 2011 at 02:04:21PM -0400, Marc Lavallée wrote: The perceived "directional bandwidth" of stereo recordings is better than what conventional stereo (with cross-talk) can reproduce. This is again a game of

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-09 Thread Neil Waterman
Totally agree 100%. Personally I would state that I have a totally different experience when listening to the same recordings via loudspeakers versus headphones. Headphones rarely give me a "the orchestra/band" is in front of me presentation (and no it is not a function of cheap or crappy he

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-09 Thread dw
On 09/07/2011 21:38, Fons Adriaensen wrote: On Sat, Jul 09, 2011 at 09:19:07PM +0100, Stefan Schreiber wrote: Fons Adriaensen wrote: On Sat, Jul 09, 2011 at 02:04:21PM -0400, Marc Lavallée wrote: The perceived "directional bandwidth" of stereo recordings is better than what conventional ste

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-09 Thread Jörn Nettingsmeier
On 07/09/2011 11:13 PM, dw wrote: Care to send a clip of an impossible-to-sound-as-good-as-with-stereo recording for me to play with. well, this kind of stand-off isn't likely to lead anywhere. "sounds good" is very hard to define or even test. i'm not terribly interested in applying xtc to

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-09 Thread dw
On 09/07/2011 22:28, Jörn Nettingsmeier wrote: On 07/09/2011 11:13 PM, dw wrote: Care to send a clip of an impossible-to-sound-as-good-as-with-stereo recording for me to play with. well, this kind of stand-off isn't likely to lead anywhere. "sounds good" is very hard to define or even test.

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-09 Thread Jörn Nettingsmeier
On 07/09/2011 11:49 PM, dw wrote: On 09/07/2011 22:28, Jörn Nettingsmeier wrote: ps. I am sure M Gerzon knew that ambisonics (low order) has theoretical sweet spot the size of a pea, but it still sounds good to some people, His fans are still as self-righteous as ever. i could imagine way wo

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-09 Thread dw
On 09/07/2011 23:10, Jörn Nettingsmeier wrote: On 07/09/2011 11:49 PM, dw wrote: On 09/07/2011 22:28, Jörn Nettingsmeier wrote: ps. I am sure M Gerzon knew that ambisonics (low order) has theoretical sweet spot the size of a pea, but it still sounds good to some people, His fans are still as

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-09 Thread Fons Adriaensen
On Sat, Jul 09, 2011 at 10:13:13PM +0100, dw wrote: > Care to send a clip of an impossible-to-sound-as-good-as-with-stereo > recording for me to play with. If it's anything I produced myself you'd just say I engineered it to fail with XTC :-) Which indeed I could easily do... I've been listeni

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-09 Thread Marc Lavallée
Fons Adriaensen a écrit : > Most stereo recordings are made to be reproduced by two speakers, > seen by the listener at an angle of 60 to 90 degrees, and such that > the signals from either speaker reach both ears. That is the way it > is supposed to work. There is a solid theory behind this. Cal

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-09 Thread Fons Adriaensen
On Sat, Jul 09, 2011 at 06:58:29PM -0400, Marc Lavallée wrote: > I understand your clinical point of view, but I don't consider the act > of listening to reproduced music as a scientific activity. Agreed 100%. But the act of analysing and discussing the merits of technical systems to reproduce so

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-09 Thread Stefan Schreiber
Jörn Nettingsmeier wrote: On 07/09/2011 11:13 PM, dw wrote: Care to send a clip of an impossible-to-sound-as-good-as-with-stereo recording for me to play with. well, this kind of stand-off isn't likely to lead anywhere. "sounds good" is very hard to define or even test. i'm not terribly

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-09 Thread Stefan Schreiber
Fons Adriaensen wrote: On Sat, Jul 09, 2011 at 10:13:13PM +0100, dw wrote: Care to send a clip of an impossible-to-sound-as-good-as-with-stereo recording for me to play with. If it's anything I produced myself you'd just say I engineered it to fail with XTC :-) Which indeed I could

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-09 Thread Stefan Schreiber
Jörn Nettingsmeier wrote: On 07/09/2011 10:19 PM, Stefan Schreiber wrote: Fons Adriaensen wrote: On Sat, Jul 09, 2011 at 02:04:21PM -0400, Marc Lavallée wrote: The perceived "directional bandwidth" of stereo recordings is better than what conventional stereo (with cross-talk) can reprodu

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-09 Thread Marc Lavallée
Fons Adriaensen a écrit : > As to material produced for conventional speaker playback, some > of it produces a 'nice' sound, with a clear spatial effect, as > long as you are not trying to focus your attention on individual > sources or instruments. Which is something I can't avoid doing > being

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-09 Thread Robert Greene
There was a method developed by Finsterle that worked very well indeed, much better than Trifield(which has always seemed to me to have a serious "center detent". Finsterle's method had sound in the rear psychoacoustically encoded not to sound in the rear but to solidify the front images. This w

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-10 Thread Eric Benjamin
uly 9, 2011 8:22:04 PM Subject: Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound There was a method developed by Finsterle that worked very well indeed, much better than Trifield(which has always seemed to me to have a serious "cente

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-10 Thread Jörn Nettingsmeier
On 07/10/2011 12:32 AM, dw wrote: I was thinking more of recording in mono, computing the vectors in various bands from the output of some large microphone array and then encoding (the mono sound) into the required number of spherical harmonics. i don't think that's possible. imagine two simila

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-10 Thread Jörn Nettingsmeier
On 07/10/2011 03:41 AM, Marc Lavallée wrote: I'm waiting for a pair of very directional speakers that should (hopefully) help me enjoy conventional stereo. then the manger might be for you: http://manger-msw.de/index.php?language=en this is a speaker that has been optimized for very good impul

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-10 Thread Fons Adriaensen
On Sat, Jul 09, 2011 at 09:41:04PM -0400, Marc Lavallée wrote: > If you could help me understand spherical harmonics, I'd be a "MAG > fanboy" in no time. The best didactic resource I found is a very > strange article titled "Notes on Basic Ideas of Spherical Harmonics". > It's so good that I bare

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-10 Thread dw
On 10/07/2011 09:00, Jörn Nettingsmeier wrote: On 07/10/2011 12:32 AM, dw wrote: I was thinking more of recording in mono, computing the vectors in various bands from the output of some large microphone array and then encoding (the mono sound) into the required number of spherical harmonics. i

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-10 Thread Fons Adriaensen
On Sun, Jul 10, 2011 at 10:10:49AM +0100, dw wrote: > Any microphone capable of separating two sound sources MUST be large in > terms of wavelengths (similar to the diffraction limit for telescopes) > The soundfield microphone cannot separate two or more sound sources at > _any_ frequency for

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-10 Thread dw
On 10/07/2011 11:02, Fons Adriaensen wrote: On Sun, Jul 10, 2011 at 10:10:49AM +0100, dw wrote: Any microphone capable of separating two sound sources MUST be large in terms of wavelengths (similar to the diffraction limit for telescopes) The soundfield microphone cannot separate two or more

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-10 Thread Fons Adriaensen
On Sun, Jul 10, 2011 at 11:49:49AM +0100, dw wrote: > You snipped the context. > > "i don't think that's possible. imagine two similar instruments, one at > 0° and the other at 180°. once recorded in mono, they will be fused > together irrevocably. you won't be able to separate them with the h

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-10 Thread Robert Greene
Is this the one you mean(the "strange article")? http://www.regonaudio.com/SphericalHarmonics.pdf I wrote it myself! I surely did not mean for it to be strange at all. But the idea is intrinsically a bit complicated. What one is really doing is developing ad hoc eigenfunctions of the Laplacian

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-10 Thread Marc Lavallée
Jörn Nettingsmeier a écrit : > On 07/10/2011 03:41 AM, Marc Lavallée wrote: > > I'm waiting for a pair of > > very directional speakers that should (hopefully) help me enjoy > > conventional stereo. > > then the manger might be for you: > http://manger-msw.de/index.php?language=en > > this is a

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-10 Thread Marc Lavallée
Robert Greene a écrit : > Is this the one you mean(the "strange article")? > > http://www.regonaudio.com/SphericalHarmonics.pdf Yes! :) > I wrote it myself! > I surely did not mean for it to be strange at all. > But the idea is intrinsically a bit complicated. > What one is really doing is dev

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-10 Thread Ralph Glasgal
Although I have done this many times before, I again put on a left right test track using RACE and two line source ESL speakers and I can rotate my head as much as my neck permits without detecting any noticeable shift in the localization of the voices at the extreme right and left.  With two sp

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-10 Thread Stefan Schreiber
Fons Adriaensen wrote: On Sat, Jul 09, 2011 at 09:41:04PM -0400, Marc Lavallée wrote: If you could help me understand spherical harmonics, I'd be a "MAG fanboy" in no time. The best didactic resource I found is a very strange article titled "Notes on Basic Ideas of Spherical Harmonics". It'

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-10 Thread Fons Adriaensen
On Sun, Jul 10, 2011 at 05:44:50PM +0100, Stefan Schreiber wrote: > As a violinist, my choice would be the sawtooth wave, just for > demonstrational purposes. Which has the same problems (infinite bandwidth etc.) But yes, as a violinist it would probably hurt your ears less... Ciao, -- FA _

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-10 Thread Marc Lavallée
Stefan Schreiber a écrit : > I don't want to annoy anybody or you, but don't explain acoustics via > square waves... I think that square waves is a good choice because of the amount of resolution required, and because of their harmonic distribution: http://www.youtube.com/watch?v=y6crWlxKB_E ht

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-10 Thread Stefan Schreiber
Ralph Glasgal wrote: Although I have done this many times before, I again put on a left right test track using RACE and two line source ESL speakers and I can rotate my head as much as my neck permits without detecting any noticeable shift in the localization of the voices at the extreme righ

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-10 Thread Stefan Schreiber
Fons Adriaensen wrote: On Sun, Jul 10, 2011 at 05:44:50PM +0100, Stefan Schreiber wrote: As a violinist, my choice would be the sawtooth wave, just for demonstrational purposes. Which has the same problems (infinite bandwidth etc.) But yes, as a violinist it would probably hurt your

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-10 Thread Marc Lavallée
Stefan Schreiber a écrit : > Now come on, a square wave is not about music! Iannis Xenakis would not agree with you... -- Marc ___ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-10 Thread Stefan Schreiber
Marc Lavallée wrote: Stefan Schreiber a écrit : Now come on, a square wave is not about music! Iannis Xenakis would not agree with you... -- Marc ___ But HIS square waves are irregular, or a chain of singularities. :-) Best, Ste

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-10 Thread dw
On 10/07/2011 18:10, Stefan Schreiber wrote: If you can't reproduce full horizontal 360º surround via two front speakers, then the "binaural via two loudspeakers" approach doesn't work, and there is no solution to reproduce "3D sound" in this way. (Your colleague Choueiri claims this on the

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-10 Thread Marc Lavallée
dw a écrit : > On 10/07/2011 18:10, Stefan Schreiber wrote: > > > > > > If you can't reproduce full horizontal 360º surround via two front > > speakers, then the "binaural via two loudspeakers" approach doesn't > > work, and there is no solution to reproduce "3D sound" in this way. > > (Your c

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-10 Thread dw
On 10/07/2011 19:36, Marc Lavallée wrote: dw a écrit : On 10/07/2011 18:10, Stefan Schreiber wrote: If you can't reproduce full horizontal 360º surround via two front speakers, then the "binaural via two loudspeakers" approach doesn't work, and there is no solution to reproduce "3D sound" in

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-10 Thread dw
This one is vaguely in-head rather than down, and also well-out-of head. I am doing these with the my public domain 'stereo' filter, which is not ideal for this. I have deleted my stuff as I am turning my back on audio for another decade after I tidy up some loose ends. http://dl.dropbox.com/u/

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-10 Thread Jörn Nettingsmeier
On 07/10/2011 06:14 PM, Marc Lavallée wrote: Jörn Nettingsmeier a écrit : and don't mind around 10% THD in the low frequencies (which is not as bad as it sounds, but also not as good as manger make it sound), oops, this is bogus. THD means "total harmonic distortion", so it makes no sense to

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-10 Thread Ralph Glasgal
Thanks Stefan.  The very bottom remarks are really about previous posts.   In theory it is possible to do full periphonic sound via two somethings (maybe not looudspeakers as we know them).  Choueiri believes he can come close to this by using laser-like loudspeakers, precision placed in a quiet

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-10 Thread Stefan Schreiber
Ralph Glasgal wrote: Thanks Stefan. The very bottom remarks are really about previous posts. In theory it is possible to do full periphonic sound via two somethings (maybe not looudspeakers as we know them). Choueiri believes he can come close to this by using laser-like loudspeakers, preci

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-10 Thread Stefan Schreiber
Hello Marc... I don't get access to the (dropbox) file. Error (404) We can't find the page you're looking for. Is this because I am not based in the USA? Best, Stefan Marc Lavallée wrote: dw a écrit : On 10/07/2011 18:10, Stefan Schreiber wrote: If you can't reproduce

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-10 Thread Marc Lavallée
Stefan Schreiber a écrit : > Hello Marc... > > I don't get access to the (dropbox) file. > > > > > Error (404) > > > > We can't find the page you're looking for. It's not my DropBox, it's David's. He probably removed the file. I get the same error. His last message was : "I have deleted my

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-10 Thread Robert Greene
No speaker requires a "fast" amplifier, whatever that means. ALL amplifiers that are not defective are far faster in any reasonable sense than any speaker is. Some amps have a tiny roll off of the extreme top on account of output networks or the like. But really this is a nonissue for any serious

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-10 Thread Marc Lavallée
You can read the propaganda from Mangler about the "required" rise time of an amplifier: http://www.manger-audio.co.uk/products.htm Robert Greene a écrit : > No speaker requires a "fast" amplifier, > whatever that means. ALL amplifiers that > are not defective are far faster in any reasonable

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-10 Thread Bearcat M. Şandor
On 07/10/2011 11:10 AM, Stefan Schreiber wrote: > To clarify a few basic things: > > The first poster in this thread (and obviously some other people who > maybe should have known better) are claiming that you could receive a > 360º representation via just two (supposedly narrow) front speakers.

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-10 Thread Marc Lavallée
Jörn Nettingsmeier a écrit : > have you seen jerome daniel's "experimenter's corner"? I tried to read the beginning of his doctoral thesis; because it's in French, I though it would be easier to understand than the vast majority of papers in English, but I was wrong because the common language

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-11 Thread Jörn Nettingsmeier
On 07/11/2011 12:39 AM, Stefan Schreiber wrote: With all these efforts, why is actually nobody just marketing a headphone solution with head-tracking? smyth research makes one (called the realizer), or there's the beyerdynamic headzone. -- Jörn Nettingsmeier Lortzingstr. 11, 45128 Essen, Te

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-11 Thread Stefan Schreiber
Well, unless the amplifier encounters some of the elusive square (freak) waves... :-D Stefan Robert Greene wrote: No speaker requires a "fast" amplifier, whatever that means. ALL amplifiers that are not defective are far faster in any reasonable sense than any speaker is. Some amps hav

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-11 Thread Stefan Schreiber
Jörn Nettingsmeier wrote: On 07/11/2011 12:39 AM, Stefan Schreiber wrote: With all these efforts, why is actually nobody just marketing a headphone solution with head-tracking? smyth research makes one (called the realizer), or there's the beyerdynamic headzone. We have discussed the s

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-11 Thread Stefan Schreiber
Bearcat M. Şandor wrote: On 07/10/2011 11:10 AM, Stefan Schreiber wrote: To clarify a few basic things: The first poster in this thread (and obviously some other people who maybe should have known better) are claiming that you could receive a 360º representation via just two (supposedly na

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-11 Thread Peter Lennox
sity of Derby, UK tel: 01332 593155 e: p.len...@derby.ac.uk -Original Message- From: sursound-boun...@music.vt.edu [mailto:sursound-boun...@music.vt.edu] On Behalf Of David Worrall Sent: 09 July 2011 17:20 To: Surround Sound discussion group Subject: Re: [Sursound] the recent 2-channel 3D

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-11 Thread Bearcat M. Sandor
On 7/11/2011 8:30 AM, Stefan Schreiber wrote: However, the "12+ channel" audio system (for Ambisonics?) is a caricature, at best. 8 horizontal speakers would be enough for Ambisonics 3rd order, for home purposes. 1st order can be reproduced with 4 speakers, you really won't need more than 6.

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-11 Thread Bearcat M. Sandor
On 7/11/2011 8:30 AM, Stefan Schreiber wrote: However, the "12+ channel" audio system (for Ambisonics?) is a caricature, at best. 8 horizontal speakers would be enough for Ambisonics 3rd order, for home purposes. 1st order can be reproduced with 4 speakers, you really won't need more than 6.

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-11 Thread Paul Hodges
--On 10 July 2011 22:47 +0200 Jörn Nettingsmeier wrote: the demise of ambisonia.com is lamentable, Indeed. But I'd like just to remind people that all of my material that was on there (plus a bit more), and all of John Leonard's, and Richard Lee's articles, are now available from my site

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-11 Thread Eric Benjamin
al sounds fairly well covered.  Now we need some more variety! I'll contact you off-list. Eric - Original Message From: Paul Hodges To: Surround Sound discussion group Sent: Mon, July 11, 2011 12:45:07 PM Subject: Re: [Sursound] the recent 2-channel 3D sound formats and their viabi

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-11 Thread Stefan Schreiber
Bearcat M. Sandor wrote: On 7/11/2011 8:30 AM, Stefan Schreiber wrote: However, the "12+ channel" audio system (for Ambisonics?) is a caricature, at best. 8 horizontal speakers would be enough for Ambisonics 3rd order, for home purposes. 1st order can be reproduced with 4 speakers, you re

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-11 Thread Marc Lavallée
Stefan Schreiber a écrit : > > Right. I was speaking of 360 horizontal. Just to be clear, how > > many speakers are necessary at minimum for a "full sphere 3D" > > system? I've been told that a double twisted hex (3 in front, 3 in > > back at ear level, and 3 in front, 3 in back up high twisted

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-12 Thread Tom Jordaan
On Tue, 12 Jul 2011 01:56:08 +0100, Stefan Schreiber wrote: The minimum for surround with height is 8 speakers, for Ambisonics 1st order. If the sphere is full-sphere (and not half-sphere), you probably need 12+ speakers, although I suspect there could be a solution with less speakers th

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-12 Thread Jörn Nettingsmeier
On 07/12/2011 03:24 PM, Tom Jordaan wrote: On Tue, 12 Jul 2011 01:56:08 +0100, Stefan Schreiber wrote: The minimum for surround with height is 8 speakers, for Ambisonics 1st order. If the sphere is full-sphere (and not half-sphere), you probably need 12+ speakers, although I suspect there coul

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-12 Thread Stefan Schreiber
Jörn Nettingsmeier wrote: On 07/12/2011 03:24 PM, Tom Jordaan wrote: On Tue, 12 Jul 2011 01:56:08 +0100, Stefan Schreiber wrote: The minimum for surround with height is 8 speakers, for Ambisonics 1st order. If the sphere is full-sphere (and not half-sphere), you probably need 12+ speakers,

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-12 Thread Jörn Nettingsmeier
On 07/12/2011 05:39 PM, Stefan Schreiber wrote: Jörn Nettingsmeier wrote: there is an AES paper by simon goodwin that deals with this layout: www.codemasters.com/research/3D_sound_for_3D_games.pdf the rationale is that you can deliver a pre-decoded stream over the eight channels of a hdmi link

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-12 Thread Martin Leese
"Tom Jordaan" wrote: > On Tue, 12 Jul 2011 01:56:08 +0100, Stefan Schreiber > wrote: >> The minimum for surround with height is 8 speakers, for Ambisonics 1st >> order. If the sphere is full-sphere (and not half-sphere), you probably >> need 12+ speakers, although I suspect there could be a solu

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-12 Thread dave . malham
Both links work for me, too. Dave (from home) On Jul 12 2011, Jörn Nettingsmeier wrote: On 07/12/2011 05:39 PM, Stefan Schreiber wrote: Jörn Nettingsmeier wrote: there is an AES paper by simon goodwin that deals with this layout: www.codemasters.com/research/3D_sound_for_3D_games.pdf the

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-12 Thread Stefan Schreiber
Jörn Nettingsmeier wrote: On 07/12/2011 05:39 PM, Stefan Schreiber wrote: Jörn Nettingsmeier wrote: there is an AES paper by simon goodwin that deals with this layout: www.codemasters.com/research/3D_sound_for_3D_games.pdf the rationale is that you can deliver a pre-decoded stream over the

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-14 Thread seberbach
the recent 2-channel 3D sound formats and their viability for actual 360 degree sound On Tue, 12 Jul 2011 01:56:08 +0100, Stefan Schreiber wrote: > The minimum for surround with height is 8 speakers, for Ambisonics 1st > > order. If the sphere is full-sphere (and not half-spher

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-14 Thread seberbach
11, 2011 8:01 am Subject: Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound On 07/11/2011 12:39 AM, Stefan Schreiber wrote: > With all these efforts, why is actually nobody just marketing a > headphone solution with head-tracking?

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-15 Thread Bearcat M. Şandor
I found that review/interview of the 2 channel surround sound i was referring to earlier: http://www.hometheater.com/content/tech-spotlight-srs-future-surround The first copy i saw didn't have the 2nd page. In it it's explained that you'd need speakers behind you to hear things behind you. They

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-15 Thread Jörn Nettingsmeier
On 07/16/2011 01:32 AM, "Bearcat M. Şandor" wrote: I found that review/interview of the 2 channel surround sound i was referring to earlier: http://www.hometheater.com/content/tech-spotlight-srs-future-surround The first copy i saw didn't have the 2nd page. In it it's explained that you'd need

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-18 Thread Dave Malham
Hi Jörn and Bearcat On 16/07/2011 06:56, Jörn Nettingsmeier wrote: On 07/16/2011 01:32 AM, "Bearcat M. Şandor" wrote: I found that review/interview of the 2 channel surround sound i was referring to earlier: http://www.hometheater.com/content/tech-spotlight-srs-future-surround The first copy

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-18 Thread Stefan Schreiber
Hi David... As you are a knowledgeable expert on this stuff :-) , I would like to take the discussion of this article/interview to a higher level... The interesting part of the interview is on the 2nd page: http://www.hometheater.com/content/tech-spotlight-page-2 But with the full evolut

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-18 Thread Jörn Nettingsmeier
On 07/18/2011 06:18 PM, Stefan Schreiber wrote: Now, it turns out that one of the techniques for projecting sound into space based on the auditory system is something called HRTF, or head-related transfer functions, where the frequency or spectral characteristics of a broadband audio signal, lik

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-18 Thread Fons Adriaensen
On Mon, Jul 18, 2011 at 07:27:26PM +0200, Jörn Nettingsmeier wrote: > Now _that_ would be an interesting case: how to render this so it appears to be the listener's nose doing the work... I hope you managed to clean your keyboard. It could have happened to me as well... Ciao, -- FA

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-18 Thread Stefan Schreiber
Jörn Nettingsmeier wrote: On 07/18/2011 06:18 PM, Stefan Schreiber wrote: Which means that they are probably using HRTF techniques. Because HRTF is an individual parameter, they would have to use some form of "standard" HRTF, as long as they don't perform individual measurements. For me, th

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-19 Thread Dave Malham
Hi Jörn, Saved me some typing - pretty well what I would have said :-) Dave On 18/07/2011 18:27, Jörn Nettingsmeier wrote: On 07/18/2011 06:18 PM, Stefan Schreiber wrote: Now, it turns out that one of the techniques for projecting sound into space based on the auditory system is som

Re: [Sursound] the recent 2-channel 3D sound formats and their viability for actual 360 degree sound

2011-07-19 Thread Dave Malham
On 18/07/2011 19:01, Fons Adriaensen wrote: On Mon, Jul 18, 2011 at 07:27:26PM +0200, Jörn Nettingsmeier wrote: I hope you managed to clean your keyboard. It could have happened to me as well... I was fortunately luck enough not to have brewed any yet this morning... Dave -- These are

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