A vehicle system interface comprises an antenna configured to receive a digital radio signal, a digital radio receiver circuit configured to receive the digital radio signal from the antenna and to obtain digital audio data from the digital radio signal, an FM modulator and transmitter circuit, and a microprocessor in operable communication with the digital radio receiver circuit and the FM modulator and transmitter circuit. The microprocessor is configured to generate a first message requesting a series of FM radio signal levels and the microprocessor is also configured to select a suitable FM radio frequency from the series of FM radio frequencies. The microprocessor is also configured to induce the FM modulator and transmitter circuit to broadcast the digital audio data in an FM radio signal over the suitable FM radio frequency.