Place it at the start of a scene change to cue the next moment, then follow it with the Metal Gear Alert for a second warning before the action begins, and save the Imperial March for the villain entrance that follows.
关于此声音
This is a brief, high-pitched electronic whistle, lasting just over a second, with a clean, rising tone like a shipboard signal. It feels playful and futuristic, turning a simple interruption into a knowing wink for fans. The cue comes from Star Trek, where similar tones preceded announcements and drew attention aboard the Enterprise.