Am Mittwoch, 11. September 2019, 01:01:01 CEST schrieb Dudley Brooks: > A quick question, of purely academic interest: > > In theory, wouldn't it be possible to get 3D spatialization with just > four speakers arranged in, say, the corners of a tetrahedron, such as > one directly above and three in an equilateral triangle below the > listener's "horizon" (i.e. the plane of the listener's ears)? I'm sure > that eight speakers would be preferable -- maybe fewer "dead spots"? > But, strictly speaking, four could do it, right? > yes,
... done 1951 with pupitre d'espace, even with 3D-Soundcontroller, the function of controlling a weigthed Amplification matrix like done in Ambisonics, so you can use it as Ambisonics 1st order,.. ;-). see https://books.google.at/books? id=psKyCwAAQBAJ&pg=PA205&lpg=PA205&dq=pupitre+de+espace#v=onepage&q&f=false mfg winfried > On 9/10/19 12:39 PM, Roman Haefeli wrote: > > On Tue, 2019-09-10 at 14:43 -0300, Alexandre Torres Porres wrote: > >> Em ter, 10 de set de 2019 às 06:15, Roman Haefeli <reduz...@gmail.com > >> > >>> escreveu: > >>> For true spatialization > >> > >> what is "true spatialization"? > > > > I mean true spatialization as opposed to simple panning. You asked for > > a panner and you were given a panner. Then you said you were thinking > > of a more sophisticated panner. And I said what you want might be > > spatialization that not only emulates a sound source traveling along a > > virtual circle, but that is able to emulate also every position in > > between. Sounds to me like true spatialization. But I'm only guessing. > > I can't read your mind, don't know what you really want. I can only > > read you mails. Only apt has super-cow powers. > > > >> And why would else/pan4~ not be "truthful"? > > > > Did I say it is not "truthful"? I'm sure it's a very true panner. It's > > even 2D (it positions the sound source anywhere between the speakers, > > not only on the outlines). Now, isn't that exactly what you want, but > > only with four channels? I'm confused now. > > > >>> - it sounds to me that is what you're aiming at > >>> - use Ambisonics[1]. > >> > >> hmm, I don't really know, and here's a silly question. It seems to me > >> ambisonics tries to locate a sound source in a 3D sphere, but the > >> idea would actually be to pan the sound source in a 2D circle space. > > > > It's a totally fine question. I'm not an expert either. Ambisonics is > > able to render in 3D, but you can also do 2D (for instance, if you > > place all speakers on the same plane). What I understand is special > > about Ambisonics, is that you do not need to know beforehand for which > > speaker setup you're making a recording or a rendering for. Only the > > decoder needs to know the exact configuration of the speakers. This > > allows for setups that are not a perfect circle or sphere. > > > >> So, can ambisonics help there or is it overcomplicated for that > >> matter? And how is it possible with 8 speakers to simulate a 3D > >> sphere? > > > > Again, not an expert speaking here, but depending on your goals you > > need that complexity. If your speaker setup is for some reason not a > > perfect circle, or the positions are not evenly spaced, the image of > > your virtual sound source(s) is distorted. If you want to account for > > that, it's probably easier to use Ambisonics than figuring out all the > > calculations on your own. Do you care for a good reproduction of > > spatial image? Do you need the flexibility that Ambisoncis gives you? > > Do you want re-invent things each time the setup is different? Would > > like to be able to switch between 2D and 3D with the same system? Do > > you want your piece to be played "correctly" at some other venue that > > is not the studio where you worked on your piece? > > > > I'm not saying you want all that. I'm just thinking that the more you > > deal with the stuff, the more those aspect are going to matter. > > > >>> There seem to be Pd externals for this. > >> > >> yeah, I know, just not sure if all the complicated encoding and > >> everything is indispensable and stuff > > > > I don't know. I'm not sure if what you want is different from > > [else/pan4~], but with 8 channels... > > > > Roman > > > > > > _______________________________________________ > > Pd-list@lists.iem.at mailing list > > UNSUBSCRIBE and account-management -> > > https://lists.puredata.info/listinfo/pd-list -- -- - ao.Univ.Prof. DI Winfried Ritsch - rit...@iem.at - http://iem.at/ritsch - Institut fuer Elektronische Musik und Akustik - University of Music and Dramatic Art Graz - Tel. ++43-316-389-3510 (3170) Fax ++43-316-389-3171 -- _______________________________________________ Pd-list@lists.iem.at mailing list UNSUBSCRIBE and account-management -> https://lists.puredata.info/listinfo/pd-list