Augmenting content for over-the-air broadcast radio (AM or FM) in connected radio and/or on mobile applications synchronized with over-the-air broadcast radio

A method comprising:

• generating a radio station broadcast signal comprising a broadcasted audio and an inaudible radio station signature, the broadcasted audio comprising an audio item now playing, the inaudible radio station signature comprising a radio station identifier;
• broadcasting the radio station broadcast signal;
• providing a middle-ware component configured to identify the audio item now playing of the broadcast audio;
• in a synchronization server, receiving from the middle-ware component an identifier that identifies the audio item now playing of the broadcast audio;
• in the synchronization server, based on the identifier, selecting second content comprising visual content associated with the audio item now playing, the visual content comprising an image file;
• establishing a data connection between the synchronization server and a user device via a data interface of the user device, the user device also configured to receive and decode the radio station broadcasting signal, establishing the data connection comprising receiving, at the synchronizer server, a user device identifier;
• receiving, at the synchronization server from the user device via the data connection, the radio station identifier;
• transmitting the second content from the synchronization server to the user device via the data connection while the radio station broadcast signal comprising the audio item now playing is being broadcast.