yes, I guess how equator truncation will modify the horizontal perception...
But, focusing on the "practical" issue of my question: We usually cannot find the way to sit 30 people on a concert hall (or many rooms) with a ring of speakers at -45º. Usually zero elevation is about 1-1.5 meters over the floor (when you sit on a chair or so...). So how can we work with full 3D ambisonics without truncating an ambisonic speaker layout at a normal concert room situation? Maybe too general and applied questions... thank you very much for your replies! Enrique Enrique Tomas wrote: then, supposing that we impose using "only positive elevations" for the encoded audio material, and loading your recommended preset, if I truncate the physical speakers like: > >0º elevation -> 8 speakers >+45º elevation -> 6 speakers >plus 1 speaker on top > >will this truncation preserve the sound image decently? >I would be more than happy if you could send me that preset, thank you very >much. > For full 3D 3rd order, one of the best setups is 1 + 6 + 8 + 6 + 1, >meaning 1 speaker at the bottom (optional of course), a ring of 6 >at elevation -45 degrees, a ring of 8 at zero elevation, a ring of >6 at +45 degrees and 1 on top. > > I repeat my question, now on this list: Isn't 2nd (vertical) order enough for this configuration, in both cases? (full-spherical/half-spherical ) I have to ask, because according to me, 2nd vertical order should be adequate for a HOA format which would be decoded to 22.2 speaker layout. (-15º, 0º, 35º and 90º elevation levels. I know that this is not a regular layout, but this would be the next issue needing some clarification... :-) ) Thanks, Stefan >Enrique > >2013/2/9 Fons Adriaensen <[email protected]> > >On Sat, Feb 09, 2013 at 02:32:07PM +0000, Enrique Tomas wrote: > > > >- If not, what do you think would be my best candidate from your practical >experience? >> >> >For full 3D 3rd order, one of the best setups is 1 + 6 + 8 + 6 + 1, >meaning 1 speaker at the bottom (optional of course), a ring of 6 >at elevation -45 degrees, a ring of 8 at zero elevation, a ring of >6 at +45 degrees and 1 on top. > >Without the bottom one that's 21 speakers. This is being used at >various places with Ambdec. I'd be happy to provide the decoder >preset. > >Note that to preserve horizontal resolution at +/-45 degree you >really need six (8 * cos (45) rounded up) and not four. With less >speakers on those rings you get a 3rd order horizontal-only system >with a lower order 3D on superposed on it. > > >P.S. Your TetraMic config will be ready in a few days. > >Ciao, > >-- >FA > >A world of exhaustive, reliable metadata would be an utopia. >It's also a pipe-dream, founded on self-delusion, nerd hubris >and hysterically inflated market opportunities. (Cory Doctorow) > >______________________________ >_________________ >Sursound mailing list >[email protected] >https://mail.music.vt.edu/mailman/listinfo/sursound >-------------- next part -------------- >An HTML attachment was scrubbed... >URL: ><https://mail.music.vt.edu/mailman/private/sursound/attachments/20130209/60bdad39/attachment.html> >_______________________________________________ >Sursound mailing list >[email protected] >https://mail.music.vt.edu/mailman/listinfo/sursound > > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://mail.music.vt.edu/mailman/private/sursound/attachments/20130209/70c4bb31/attachment.html> _______________________________________________ Sursound mailing list [email protected] https://mail.music.vt.edu/mailman/listinfo/sursound
