[LAU] ambisonics: fons ambdec and muse.demon.co.uk ambidec

[Niels Mayer]

On Fri, Jan 7, 2011 at 1:29 PM, Paul Davis <paul at linuxaudiosystems.com> wrote:
> ambisonics assumes a speaker in the midst of an array of speakers that
> point more or less in the general direction of
> the listener's head. this phone is just a gimmick.

If that is true, then I guess the link I posted regarding
CNMAT/MeyerSound "eigenspeaker" is bunk?

I'm talking about a different configuration of ambisonics than the
traditional speakers around the listener and the associated sweet
spot. IMHO that's a somewhat difficult configuration, especially for
mobile apps, so I was just wondering whether the effect be gained with
only four speakers in a "polar" configuration.

And if not four, six, eight, or how many? Can they be arranged in a
"circle" around the perimeter or is 360 degree configuration of
drivers required?

Note:

On Sun, Sep 19, 2010 at 5:56 AM,  <fons at kokkinizita.net> wrote:
> On Sat, Sep 18, 2010 at 05:35:03PM -0700, Niels Mayer wrote:
>> The question, is it possible to have a torus shaped
>> sweet spot for the audience surrounding the "EigenSpeaker" ?
>
> Such speakers do exist, Ircam in Paris has done quite some research
> on them. They are based on AMB theory, but they do not provide AMB
> playback - what you get is a speaker that can generate multiple
> steerable beams. It's used in acoustic measurements to excite just
> part of a space, and in EA music to simulate the directivity of real
> instruments.

-- Niels
http://nielsmayer.com