Place it at the reveal of the portrait, after the X-Files Theme has played and before the awkward crickets fill the pause that follows, then cut to the reaction shot for the payoff.
关于此声音
This 11-second voice clip repeats a strange, sing-song invitation in a low, playful tone, as if a painting on the wall is calling someone inside. The looping nonsense words make it feel unsettling and silly at once, like a haunted-house greeting that is trying too hard to sound friendly.