Definition of Mixed-order Ambisonics
It is possible to define an Ambisonic signal set with non-uniform resolution depending on source direction. This practice is called mixed-order, and it has consequences for the layout and interpretation of files, streams, or physical connections in Ambisonic data exchange. As with all things Ambisonic, complexity has increased as research progressed, and the term has grown to include new concepts which were not anticipated when Ambisonics was first invented in the 1970s.
When dealing with subsets of the multipole expansion, the base ordering of the components (according to whatever ordering scheme has been agreed on) is usually not changed. Instead, the unused components are simply left out, or, where bandwidth or space is not at a premium, zeroed.
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Frequently asked questions
What is Mixed-order Ambisonics?
It is possible to define an Ambisonic signal set with non-uniform resolution depending on source direction. This practice is called mixed-order, and it has consequences for the layout and interpretation of files, streams, or physical connections in Ambisonic…