hi olaf!
On 01/06/2011 11:14 PM, sh0099@xxxxxx wrote:
Hallo
I was wandering if i can use
"First and Second Order Ambisonic Decoding Equations"
from this page:
http://www.muse.demon.co.uk/ref/speakers.html
for setups in ambdec by fons?
http://www.kokkinizita.net/linuxaudio/
The Speaker Setups are from/for a programm called "Ambisonics
Command-Line Decoder"
http://www.muse.demon.co.uk/utils/ambidec.html
my problem is that the speaker position is of demons ambidec is in
positions in the room (x,y,z) and not as dist,azim,elev as in fons ambdec
is there some handy script somewhere to convert between these two?
why would you want to do that? ambdec comes with a number of example
configurations, and iirc, they cover all the speaker layouts that are
covered on richard's page, plus a few more.
or do you want to create a custom layout and have amb*i*dec compute a
configuration for you?
if so, conversion between polar and cartesian is not too hard... if your
listening position is at the origin of both coordinate systems, then
(off the top of my head), you should get something like:
azimuth = arctan (y/x)
elevation = arctan (z/(sqrt(x^2 + y^2))
r = sqrt (x^2 + y^2 + z^2)
(do double-check that, it's late and i don't even have a scrap of paper
here to draw it up properly...)
i'm pretty sure that the custom layout matrix you will get out of
amb*i*dec will yield worse results than ambdec, because it does not do
proper dual-band decoding.
out of curiosity, what layout are you looking for?
best,
jörn
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