BOULDER, Colo. — Artificial intelligence is getting better all the time at creating content, sometimes too good. Now, a Los Angeles–based startup called Noctal, founded by a University of Colorado-Boulder student, is using AI to change how sound is added to video, while promising to keep humans at the heart of the art. Think AI-embedded sound effects in movies, TikTok posts, and even news reports – tools that can speed up and even perfect the editing process.