I'm using the superxfi with Kodi but unsure of the settings to make Kodi output 7.1. It shows up as SXFI AMP - Analog and SXFI AMP - SPDIF With the Analog option when I choose 7.1 there's no sound, with the SPDIF option there's no 7.1 option. Sound comes out but I can't tell if it's true...