Smooth Soul-Capture Sound Effect by Boteman
I thought the original soul trap sound effect was too over-the-top.
This sound effect replaces the original. It's spookier, and more subtle.
Xilmordas Crow's mod, Demonic Soul Trap, was the inspiration for this.
Video: https://www.youtube.com/watch?v=oMErhFuOuaY
Skip to 0:38 for the sound effect in-game, and 1:14 for the sound effect alone.
Manual installation: Merge the sound folder in the download with the one in your Skyrim install location.
Enjoy! <3