Place it at the start of a scene to summon a character, then follow it with a reaction sound once they turn, and keep a second, louder impact for the payoff later in the edit so the call, the turn and the reveal stay in that order.
關於此聲音
This is a short, 1.8-second whistling clip that repeats the two-note call 'fio fio' in a clear whistle. It feels light, playful and instantly attention-grabbing, like someone calling out to you from across a room with a smile. The bright, simple call makes it easy to recognise and hard to ignore.