Put this clip at the start of the ambush sequence, before the reveal, then follow it with Dun Dun Dun while the riders approach. Add Metal Pipe Clang at the impact moment for a hard clash, and keep the warning as the scene's first cue.
关于此声音
This is a short 2.3-second spoken warning in which a firm military voice calls out that cavalry are approaching. The delivery is clipped and commanding, landing as a single direct alert rather than a longer speech. It feels tense and urgent, like an alarm raised just before mounted troops arrive, and it works best when the danger still feels sudden.