Creative Soundblaster Omni - 5.1 - Kodi 18 RPI3

Hi Guys,

Just after some help setting up my creative sound blaster omni, on my RPI3.

Plugged in its recognised and plays, but getting it to output to all 5 speakers doesnt seem so easy.

I have set the channels to 5.1 and allowed passthrough with no real luck.

Any ideas on setup welcome?

Thanks

Ed