What I understood JRSS is acting a bit like these following formats:
Dolby Pro Logic,
Dolby Pro Logic II,
Dolby Pro Logic IIx,
Dolby Digital EX,
DTS-ES Matrix,
DTS Neo:6,
THX Ultra2
We can find some informaion about exacte matrix of Dolby Pro Logic and Dolby Pro Logic II here:
http://en.wikipedia.org/wiki/Matrix_decoderCould you provide some information how JRSS is matricing stereo to 5.1, stereo to 7.1 and 5.1 to 7.1?