The clip survives from the Messenger Plus add-on for MSN Messenger, the chat program that defined online conversations in the 2000s, when users shared short custom sounds instead of emojis. Its ID3 tag still credits Messenger Plus and the title '!Passarinho oo', while Brazilian users describe it as a time-tunnel relic from that era. As MSN faded, these audios migrated to forums, phone transfers and later WhatsApp groups, where the Portuguese word passarinho, meaning little bird, kept the sound easy to search, share and rediscover.