If speaker positions are expressed in terms of azimuth, elevation and distance, the numbering could be a function of those 3 parameters. -- Marc
Le Sat, 19 Nov 2016 15:03:44 +0000, Dave Malham <dave.mal...@york.ac.uk> a écrit : > Absolutely - there speaks the voice of long experience. Never, never > blindly trust labels on cables. If you do, sooner or later they'll > turn round and bite. Labels help vastly but always run test signals > to check things to be sure. Incidentally, Trinov make a 3-d mic > system that is specifically designed for making acoustic measurements > including, most importantly for this discussion, loudspeaker > positions. See http://www.trinnov.com/technologies/3d-microphone/ . > If you can measure the speaker positions directly (and have the time > before the gig!) that avoids the need to get the labels right > since,assuming you can route signals flexibly in your source system, > you can just get everything right there. > > If you don't want to do the acoustic measurements, just get the > loudspeaker positions, a similar job can be done with cheaper, > unmatched, electrets spaced more widely so that simple time-of-flight > measurements can be used rather than acoustic analysis as I belief > Trinnov are doing. That way you've only got the connections to the > measurement system to get right to ensure you've gotten the speakers > connected appropriately for your purposes. > > Dave > > On 19 November 2016 at 12:50, David Pickett <d...@fugato.com> wrote: > > > In order to check that everything is correct, despite one's > > impeccable logic in imagining a virtual transformation matrix > > between how one thinks the signals should be numbered and the > > reality of the specific situation, I recommend that everyone have a > > test recording that identifies each channel. With this it is > > relatively easy to check and correct, while avoiding total > > confusion. > > > > David > > > > At 14:21 17-11-16, Peter Lennox wrote: > > >I once spent two days trying to understand the mapping of a 32 > > >(periphonic) speaker rig, as there were 3 different speaker > > >numbering 'conventions' in use, by 3 different parties: one used > > >counterclockwise numbering of 'slices' - middle, top, bottom, > > >another used a similar system but clockwise, and another used > > >weird kind of helical 'start at the top, downwards in stripes', > > >kind of system. Each party thought their system was logical and > > >obvious, so it didn't need documenting. > > >Trying to understand what was actually wired to what was a > > >comical > > nightmare. > > > > > >Dr. Peter Lennox > > >Senior Lecturer in Perception > > >College of Arts > > >University of Derby, UK > > >e: p.len...@derby.ac.uk > > >t: 01332 593155 > > >https://derby.academia.edu/peterlennox > > >https://www.researchgate.net/profile/Peter_Lennox > > > > > >-----Original Message----- > > >From: Sursound [mailto:sursound-boun...@music.vt.edu] On Behalf Of > > >Dave > > Malham > > >Sent: 17 November 2016 11:10 > > >To: Surround Sound discussion group <sursound@music.vt.edu> > > >Subject: Re: [Sursound] Speaker numbering > > > > > >Your second layout is what I always tended to do when I had > > >control of the numbering but when working in a venue other than > > >your own you often > > don't. > > >Personally, I'm not sure about "standards" for something as > > >variable as a multispeaker array since I would ALWAYS want to > > >check that they really, really were connected to the standard - I > > >have been caught out too many times over the years :-( > > > > > > Dave > > > > > >PS Actually, I would usually check my own rig, just in case someone > > >had played silly buggers with the leads since last time I used it. > > >Like I said, been caught out too many times.... > > > > > > > > >On 16 November 2016 at 22:12, Augustine Leudar > > ><augustineleu...@gmail.com > > > > > >wrote: > > > > > >> How do you number you arrays - there seems to be two ways I've > > >> come across.. Using the example of an octophonic array The first > > >> way seems to be circular : > > >> > > >> 1 2 > > >> 8 3 > > >> 7 4 > > >> 6 5 > > >> > > >> The other way is as follows : > > >> > > >> 1 2 > > >> 3 4 > > >> 5 6 > > >> 7 8 > > >> > > >> There doesnt seem to be an standard way of doing this - I was > > >> curious as to how other sursounders number their speakers ? > > >> -------------- next part -------------- An HTML attachment was > > >> scrubbed... > > >> URL: <https://mail.music.vt.edu/mailman/private/sursound/>> > > attachments/20161116/493aaff8/attachment.html> > > >> _______________________________________________ > > >> 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. > > >> > > > > > > > > > > > >-- > > > > > >As of 1st October 2012, I have retired from the University. > > > > > >These are my own views and may or may not be shared by the > > >University > > > > > >Dave Malham > > >Honorary Fellow, Department of Music > > >The University of York > > >York YO10 5DD > > >UK > > > > > >'Ambisonics - Component Imaging for Audio' > > >-------------- next part -------------- > > >An HTML attachment was scrubbed... > > >URL: > > ><https://mail.music.vt.edu/mailman/private/sursound/attachments/201611 > > >17/5bf90225/attachment.html> > > >_______________________________________________ > > >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. > > > > > > > > >The University of Derby has a published policy regarding email and > > >reserves the right to monitor email traffic. > > >If you believe this was sent to you in error, please reply to the > > >sender and let them know. > > > > > >Key University contacts: http://www.derby.ac.uk/its/contacts/ > > >_______________________________________________ > > >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. > > > > > _______________________________________________ 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.
