Check what convention the ADT uses for speaker co-ordinates. It may be that
you have some of your + or -  the wrong way round, or assigned to the
incorrect axis.
For Ambisonics convention,
 X is front and back, Y is left and right, Z is up and down.
It is a 90 degree rotation from graphics convention (+x right, +y forward,
+z up).
This would obviously make a big difference to the decode, and one that i
have been stumped by myself many times..

Steve

On 6 Jul 2017 00:02, "Martin Dupras" <martindup...@gmail.com> wrote:


I'm not entirely sure I follow the speaker coordinates question. The
way I've done it is by putting radius, azimuth and elevation for each
in a CSV file to ADT, which then calculates the right encoding
configuration for that particular array. I trust that ADT and ambix
decoder are doing the right things, e.g. that "speaker 1 is at radius
4.5m and, 0 degrees azimuth and -22.5 degrees elevation" is actually
receiving the right mix of signals.

But this is useful, thank you. I wouldn't be surprised to find that
I've overlooked something, so any more things to check are welcome!

- martin
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