Can't find EAX setting in GoG version (X-fi + Alchemy), only A3D (which i can't activate).. So no surround sound support for me.
Topic on Talk:Star Trek: Voyager - Elite Force
The problem is apparently not specific to the GOG version: https://www.vogons.org/viewtopic.php?t=32985
Hmm, they mainly discussing A3D support, but maybe this applies also to EAX 2 support (patch 1.2 break it)