Abstract: Systems and methods are provided for presenting secondary content. Particularly, the secondary content may be presented on a first device (such as a smartphone, for example) and may be based on primary content that is being presented to the user via a second device. For example, if a product is shown during a television show being presented to the user via a television, and the user desires to view additional information about the product, the user may interact with a smartphone application. Based on the interaction, the first device may being processing audio produced by the television. Embedded within the primary content may be a number of “tones” that include frequencies that are inaudible to humans. The first device may detect a tone and the tone may be decoded to obtain a timestamp associated with the primary content. This timestamp may then be used to determine which secondary content associated with that timestamp to present to the user on the first device.