you can also get reasonably nice downmixes to quad and stereo by combining channels as well . However, the problem with Scheops type systemsI see is upmixing rather than downmixing. YOur basically spreadinge signal over several speakers when you do that which blurs localisation horrible- and this is where ambisonics should, theoretically, have an advantage.
<https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail&utm_term=icon> Virus-free. www.avast.com <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail&utm_term=link> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2> On Thu, 22 Oct 2020 at 16:32, Fons Adriaensen <f...@linuxaudio.org> wrote: > On Thu, Oct 22, 2020 at 12:36:38PM +0100, jack reynolds wrote: > > > The only problem with using ambisonics mics is the high frequency limit > > above which they stop working properly. A second order ambi mic reduces > > this problem, but above about 7Khz the not quite coincident capsules > > becomes a problem. > > First order responses from an OctoMic are near perfect up to 11 kHz or so, > and not perfect but still very usable even at 15 kHz. I doubt very much > if there is any 'real' cardioid' doing better at that frequency and above. > Certainly not if you take diffraction / reflection from the mic body and > clamp into account. > > Anyway, have you ever considered the sort of frequency and polar response > you get by combining signals from capsules spaced more than 10 cm apart ? > You'll find they look quite horrible if you care to compute or measure > them. > > You could of course object that those should never be combined, just each > one sent to its own speaker. But that would mean that such a one to one > mapping is the only possible way to use such signals if you want to > preserve > sound quality. No downmixing or anything similar (e.g. binaural) allowed. > > But we all know that this is not true, we all have heard very nice music > recordings done with spaced mics. Even those in theory horrible frequency > or polar responses resulting from spaced mics can sound quite well. Wich > in turn means that this whole 'imperfect polar responses' debate is mostly > academic if not irrelevant. > > > Ciao, > > -- > FA > > _______________________________________________ > 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. > -- Artist website: www.augustineleudar.com Business website: www.magikdoor.net -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://mail.music.vt.edu/mailman/private/sursound/attachments/20201023/17717069/attachment.htm> _______________________________________________ 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.
