Hi David, Thanks for your considered response.
I _was_ actually thinking of it autolocating the speakers. And not necessarily just for ambisonics, actually. Some sort of a spectrum analyser/preamplifier device that derived the correct decode/gain controls of the real system acccording to the actual location of the loudspeakers, decode algorithm and your preferred listening spot ... and that self-callibrated each time you turned the system on. Given how difficult it seems to be for billions of people to set up a 5.1 system, surely there must be a market? I'm actually surprised that such a device doesn't already exist. Oh well, back to the stone-age method... David On 23/09/2013, at 9:33 PM, Dave Hunt wrote: > Hi, > >> Date: Thu, 19 Sep 2013 21:50:00 +0200 >> From: David Worrall <worr...@avatar.com.au> >> To: Surround Sound discussion group <sursound@music.vt.edu> >> >> Hi All, >> I'm away from my back-up of this list (*) so please forgive if this has been >> answered before, but >> >> Is there - on the market, or in other form - a setup system/tool that auto >> configures a decoder and calibrates an ambisonic playback rig according to >> the (actual) position of the loudspeakers? >> >> thanks, >> David > > Presumably it doesn't have to auto-locate the speakers ?? That would be > clever and probably expensive. > > I have something that was built in MAX/MSP, and can turn it into an > application (Mac OS preferred but Windows is probably possible). It is first > order only, up to 16 speakers, and based on all the info about good decoders > I've found, and can understand and implement. Of course it could be extended > to higher orders, once the maths is thought through and the issue of > different kinds of W. > > Haven't done this as most of the people I'm dealing with don't have enough > speakers to make it worthwhile or essential. It's basically part of something > else which is trying to do all sorts of ambisonic things with 16 inputs from > a DAW running on the same computer. So, until higher powered computers become > affordable in an income challenged age, processing power has to be carefully > used. Increasing the ambisonic order starts to push up the number of audio > streams that need handling in a non-linear manner. Such a decoder needs > listening to, which means that you have to able to generate something to > listen to to assess how well the encode/decode works, something I haven't had > time to do above 2nd order. > > If only there was more time, things got done quicker, or someone was paying > for the work by the hour. > > Ciao, > > Dave Hunt > _______________________________________________ > Sursound mailing list > Sursound@music.vt.edu > 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/20130926/3ad4f0bf/attachment.html> _______________________________________________ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound
