I don't believe so. This mod only takes place on Malachor V, so as long as you have a save from before you arrive on Malachor V you should be good to install this mod.
I would recommend creating saves from before and during Malachor V until you reach this scene. The mod replaces all of the vanilla audio with with new audio that applies a new hologram filter over the old lines so that the "make my sacrifice mattter" line with the hologram filter matches the other lines. If, hypothetically, the lines were mute and/or some lines don't work feel free to report this to me and I shall fix it (the save games you'd have made will be used if there is a bug fix update).
I do know the "Steam Deck" version of Kotor II reportedly has issues with .MP3 files and audio formatting, and since I only use the Steam version of Kotor II on a Windows PC it's hard for me to get these things working right across various operating systems which I don't even use.
Congrats on this addon!
EDIT: I have already installed all of the mods as shown in the comments section of WildeKarrde's Bao-Dur Departure mod section, and I am wondering if I have to do a clean install for this addon to work.
COMPATIBILITY
Incompatible with any mods that hard overwrite the dlg files for Atton, Bao-Dur, Disciple, Handmaiden, Mira, or Visas.
Compatible with PartySwap by Darth Tyren & Leilukin using the included compatibility patch.
@offthegridmorty Just like vault13deathclaw has said, both the Handmaiden and the Disciple have fully voiced VO for the training sections.
The file names are as follows:
GBLDISCIPLE365
GBLDISCIPLE366
GBLDISCIPLE480
GBLDISCIPLE481
GBLDISCIPLE482
GBLDISCIPLE483
GBLDISCIPLE484
GBLDISCIPLE485
GBLDISCIPLE486
GBLDISCIPLE487
GBLHANDMAIDEN411
GBLHANDMAIDEN412
GBLHANDMAIDEN413
GBLHANDMAIDEN414