Angelo Farina has done a very instructive analysis of three 2nd order ambisonics decoders for ITU 5:1: * Emigrator by Gerzonic Decopro by Gerzonic and Wigware by Bruce Wiggins leading to the following conclusions:
- Emigrator employs the Furse coefficients which are plainly wrong.
- Decopro works reasonably but features constant-directivity virtual microphones with aimings perfectly corresponding to the speaker angles and this is suboptimal in the case of a strongly-irregular loudspeaker array.
- Wigware is the best one providing spatially-optimized variable-directivity patterns which should provide better reproduction and more uniform surround sound.
