Hey Yoshi, yeah I got that afterward, sorry! My bad. I'm definitely not suggesting that things are borrowed from KOTOR anyway or any EU - I actually didn't start playing it until after the movie (was on a Star Wars low). But it definitely sounded like it to me, maybe just effects. However, Sidious has some pretty nutty voice effects throughout - in the Sith Knighting of Anakin, he is all over the place, and they did an excellent job of making his voice daemonic / harmonic, to give it an otherworldly effect. So it's maybe not too much of a stretch to suggest that he does command Sith powers related to his voice? Not confirmed of course... I haven't read the novel.