So I made a new summoned creature. It's a ghostly something, so I gave it the Sovngarde Hero visual effect spell. I also want it to be quiet (as in, no barks at all).

So, I set its sound level to "Silent", Voice Type to "None", and inherit sounds to "None". It does just fine fighting (no grunts, yelps or such), but when idle, it does the undead "uuuuuuugh" sounds. It usually starts after combat. How do I make it completely silent?

And another thing... for some reason, the game CTDs when the spell expires. I can't for the life of me figure out why. I copied the spell effect from SummonDremoraLord effect (just changed the ID from ConjureDremoraLord to ConjureNewGhost), and changed the Summoned Creature to the new creature I made. The spell itself is also a copy of the Conjure Dremora Lord spell, with the new magic effect substituted.

I even tried changing the Summoned Creature back to Dremora Lord, and it still CTDs. Any idea why this would be happening?

EDIT: It seems that the game crashes if I dispel or recast the spell within the first 10 seconds of its duration (or if the summoned creature dies within 10 seconds of being summoned). After 10 seconds elapses, everything works normally. No idea why this would be happening...

Some Sound events of Actors or Creatures are stored with the Animations

Got it. I wonder if someone has a clue about the crash cause though...

have you checked it's package flags? your "uuh"-sounds could very well be, like, 'idle pvssyr' technically, so you could try to disable anything like "allow idle pvssyr", "allow random conversations", "greet player" and what not and see if it shuts up then