According to the TIE Fighter Owners' Workshop Manual published in 2019, Emperor Palpatine wanted the single-pilot ships to intimidate enemies by regularly letting out "a noise akin to a screech ...

So I've had the itch to replay the original CD-ROM edition of TIE Fighter. I played it originally when it came out. I pulled out my original CD and I've been playing it on my old Pentium 3 system ...