Kodi 16.1 SPDIF help

[Deleted]

OK, this may need to be in stupid question zone...
My HTPC is a Zotac ZBOX-AD04-PLUS-U with HDMI, SPDIF out
I just upgraded from OpenELEC- new install of Kodi 16.1 built on Lubuntu 16.10. I wanted a full OS to do other things.
I can NOT get the digital audio to pass through SPDIF toslink. SPDIF worked perfectly before.
It will pass via HDMI to UMC-200, but I can't use HDMI on my other legacy receivers.
Kodi> System> Setting> Audio output> Enable audio DSP processing. then I get "you need an add-on installed to be able to use audio digital signal processing" kodi 16.
Ok, I need to enable, add Audio DSP Plugin to AddonManager. How?
I've looked all over Kodi wiki, HTPC Beginners, etc. forums can't find a thing.

SO, I'm asking you folks here (because you're really smart) How, Where do I find it, I'm getting really p-off.
I can copy/paste terminal commands with the best of them.

HELP please,

Jeff

I'm about to drink a few "pops"

[thepcguy]

Check your PC's SOUND settings first.
I'm not familiar with Linux, but this is how you set it in Windows:

[Deleted]

See... the folks here are smart. I didn't think of that.
I'll just start clicking things until something works...lol