Interesting. Note the similar configuration to the Core OctoMic - a double tetrahedron with 180° orientation of the overlapping tetra, which makes it a.. looking it up now.. stella octangula? More importantly, how well-behaved are the 2nd order patterns from these 8 element arrays I wonder? Anyone come across any AES papers reporting measurements of them with regards to 2nd order spatial performance?
Just based on channel count alone it seems to me this is about where analog out becomes impractical and USB connectivity becomes compelling.