Atlântida is a pop and rock radio network broadcasting in southern Brazil, owned by the RBS media group, with flagship stations in Porto Alegre and Florianópolis. Its station idents and 'hora certa' time signals are familiar to Brazilian listeners, and short recordings of them circulate online as shareable audio clips. Creators outside Brazil mostly use the Atlântida signal as a generic retro-radio drop, a quick burst of broadcast flavor that needs no translation. Like many user-uploaded radio snippets, its charm lies in sounding like real airtime captured on the fly.