The jingle is credited to Ian José Silva for Rádio Metró and is built around the slogan Metró é só desgraça, a deliberately self-mocking line that turns a complaint about the station into its identity. Rather than a polished corporate ident, it works as a piece of local radio humour that listeners can recognise, repeat and remix. Online, short station jingles like this are often saved for parody broadcasts, reaction edits and community in-jokes, where the familiar melody does much of the storytelling before a single new line is added.