On 01/17/2011 03:43 PM, Ronald C.F. Antony wrote:
On 17 Jan 2011, at 09:20, Jörn Nettingsmeier wrote:
On 01/17/2011 02:51 PM, Ronald C.F. Antony wrote:
Well, four cardioids at 90 deg. angles could be used to create
both two fig8 signals at 90deg from each other, plus an omni by
summing all four. So wouldn't that already be more or less
account for horizontal-only B-format?
it would, but so would three, so why waste one?
Easy: because there is a mic with four of them stacked, precisely
aligned in 90 degree angles.
ah, i see. didn't catch that this thing actually contains four
independent cardioid mikes.
Also the fig8 is easier to do just in a mixer with a phase flip and
sum of two signals IIRC.
good point.
The main reason is simply that this is a mic that can be bought off
the shelf that seems to ave what it takes and costs well under $1k
including cables and shipping.
has anyone here used the quad mike? any comments?
PS: thanks for the plot and the math. Might be useful in the future.
don't ever rely on my math :) but gnuplot is nice in that you can figure
out stuff "by eye" to get a grasp of things...
--
Jörn Nettingsmeier
Lortzingstr. 11, 45128 Essen, Tel. +49 177 7937487
Meister für Veranstaltungstechnik (Bühne/Studio), Elektrofachkraft
Audio and event engineer - Ambisonic surround recordings
http://stackingdwarves.net
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