Thats exactly what I've been thinking, and with all the solutions I've tried I figured it was just something that I messed up with on my PC (I'm not the smartest when it comes to computer stuff), but honestly your idea sounds more plausible. Part of me was thinking that maybe I was missing an audio file, but I scanned my files like 5 times and repaired the app's files through EA, Steam, and Epic countless times.
Glad to see I'm not the only one with this problem, hopefully one day we can figure out a solution. It's hard to enjoy a Star Wars game, especially with it's recent popularity boost, without all of the Star Wars sounds.