Ghost Trick 2023 Mod: Countdown (Arranged) Music Adjustment
The closest thing "Countdown" has to a melody is this odd harsh beeping instrument. It really drives the song's tense nature. Unfortunately, the arranged version of Countdown from the 2023 remaster completely removes this lead instrument.
To my surprise, all the music files in the remaster are completely unencrypted, uncompressed WAVE files (The devs should've compressed them, they could have reduced the file size of the music from ~675 MB to ~63 MB). This made it very easy to modify the "Countdown" arrangement to include that lead instrument.
I have only tested this mod on the demo, and only while disconnected from the internet, but it did work under these circumstances.