Place it just before the reveal in your edit, then follow it immediately with a cheer for a successful payoff or a flat reaction for an anticlimactic one, so the wait and the result sit back to back in the same beat.
關於此聲音
This is a short spoken clip of a voice delivering the line "You've waited long enough" in a firm, impatient tone, lasting about a second. It feels dramatic and teasing at once, like a payoff after a long build-up, and it lands best as a blunt cue that the moment everyone has been waiting for has finally arrived.