Hi Martin, one note on the arrangement, as far as I know, traditional ambisonic decoding won’t work on hemispherical setups (due to the partial coverage of the sphere by the speakers). You may have to use more recent/advanced methods to get decoding matrices, such as the energy-preserving ambisonic decoding with modified basis functions (EPAD), or the hybrid ambisonic/VBAP All-round ambisonic decoding (ALLRAD), published by Franz Zotter (and collaborators) from University of Graz.
I know of two usable available implementations of such decoder matrix calculators, one is a compact Matlab/Octave library I made available recently: http://research.spa.aalto.fi/projects/ambi-lib/ambi.html https://github.com/polarch/Higher-Order-Ambisonics the other is Aaron Heller’s ambisonic decoding toolbox, more extended than mine, which includes scripts to produce VST plugins from the decoding matrices using Faust, which may be more suitable for your workflow: https://bitbucket.org/ambidecodertoolbox/adt.git Best, Archontis > On 08 Feb 2016, at 17:19, Martin Dupras <martindup...@gmail.com> wrote: > > Hi, > > I'm intending to try setting up a 16-speaker Ambisonics array next > week in a small TV studio. I'm trying to figure out the practical > arrangements for setting up the speakers. I was wondering if anyone > with experience might be able to offer some advice or point me in the > right direction? > > What I'm planning at the moment is a half-sphere arrangement which > would likely consist of: > > - 8 speakers in a circle of radius 2m at a height of approximately 1.6m > - 6 speakers in a smaller circle at an elevation of 45 degrees > - 2 speakers at an elevation of approximately 75 degrees > > Alternatively, I would be happy with an arrangement similar to the > first 16-speakers in this diagramme: > http://www.matthiaskronlachner.com/wp-content/uploads/2013/10/loudspeaker-plan-observatory.jpg > > I've been trying to find out if there is a convention or "most usual" > arrangement but couldn't find anything. I'm not particularly attached > to the actual arrangement, I just want to find an arrangement that > will work well enough with 16 speakers. Any advice? > > The other thing I would welcome is advice on how to mount the speakers > to lighting rigs in a manner that is practical enough to offer some > good compromise between precision and ease of setup. I believe the > speakers we'll be using for the upper tiers will be Genelec 8060s. > > Many thanks. Any advice will be greatly appreciated! > > Cheers, > > - martin > _______________________________________________ > Sursound mailing list > Sursound@music.vt.edu > https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe here, edit > account or options, view archives and so on. _______________________________________________ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe here, edit account or options, view archives and so on.
