On 03/26/2016 09:15 PM, Bo-Erik Sandholm wrote:
I will use foa in b-format, as far as i remember ambix is Only Chanel order
different in for Higher order b-format ..
No. AmbiX has a different channel ordering altogether, and its weighting
coefficients are different. First-order AmbiX is fundamentally
incompatible to POA B-format, although trivially converted.
https://en.wikipedia.org/wiki/Ambisonic_data_exchange_formats#Reference_table_of_layouts_and_normalisations
Note that Bruce Wiggins pointed out an inconsistency between the
weighing coefficients of SN3D (which are taken from Chapman) and the
formulation of SN3D by Nachbar et al. (which, if combined as-is, will
yield a result that is off by 1/4pi or, as Franz Zotter helpfully
pointed out, ~11dB). Not terribly disturbing since it's constant, but
something that needs to be fixed for internal consistency.
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