Location gets smeared across a huge area/arc when speakers are far away from each other. More speakers equals more precise sense of sound source position.
On Tue, Sep 10, 2019, 4:10 PM Dudley Brooks <[email protected]> wrote: > 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? > > 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 <[email protected] > > 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-l...@lists.iem.at mailing > list > UNSUBSCRIBE and account-management -> > https://lists.puredata.info/listinfo/pd-list > > > _______________________________________________ > [email protected] mailing list > UNSUBSCRIBE and account-management -> > https://lists.puredata.info/listinfo/pd-list >
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