The .ape format is lossless, so it this the same as .flac. You might want to convert the .ape to a .flac. You can use http://www.ffmpeg.org/ to reencode the file to .flac. It is a command line software so it might be hard for you.
Hello,Ryzen.I extracted the downloaded RAR files (part1–part6) using 7-Zip. However, I get an error with Voice.xp3. The game itself launches, but there's no voice audio. I apologize for the trouble, but I'd really appreciate it if you could look into this issue.