A composite signal having frequencies within a sonic first frequency bandwidth may be received from a communication media on a receiver. The composite signal may include an audio base signal and at least one code signal. The code signal may be encoded with a code. The composite signal may be output on a speaker, the speaker converting the composite signal into sound. While outputting the composite signal, a signal processing device may detect the output sound corresponding to the code signal. The code may be determined from the detected output sound corresponding to the code signal. Data associated with the code may be retrieved from a data storage device that is internal to or remote from the signal processing device. The retrieved data, when displayed on a display device, may be selected by a user. The signal processing device may automatically send signal-processing-device-specific data to a remote server when the code is determined or when the user inputs an input using the displayed code-associated data.