On Thu, Jun 16, 2011 at 10:11:25PM +0200, Philipp wrote:
Just what you suggest: it leads to an equilateral triangle and
that *suggests* there is something fundamental about it. But as
far as I know there isn't. Another reason may be that +/- 30
degrees corresponds to the perspective of an average listener
in a concert hall - probably more than say +/- 45 degrees.
OTOH, a recording technique like e.g. Blumlein (two fig-8 mics
at 90 degrees) would suggest a speaker angle of 90 degrees
A wider angle will make near-center sources less stable. The
number that matters here is the magnitude of the velocity
vector which is cos(1/2 the angle): 0.866 for 60 degrees,
0.707 for 90 degrees, while for a 'real' source it would be 1.
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