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MP3 다운로드 
Place it at the end of a reaction sequence, after a Vine Boom for the setup and before a Bell Ding for the reply, so the two-letter moment closes the beat and hands the scene to the next message.
이 사운드에 대해
This is a 1.9-second sound built around the letters IO, kept to a single brief burst with nothing else added to the clip. It feels abrupt and playful, like a tiny punctuation mark for a joke or a reaction, giving a chat or an edit a sudden jolt of energy. Its compact shape keeps the focus on those two letters, without asking for attention beyond that instant.
