The RPA-SPDIF module is an Analog-to-Digital converter designed for use with an RP4.2-HY11 or RP4.2-HY12 interface to replace the factory Hyundai radio with a more advanced aftermarket head unit. The module converts analog audio from an aftermarket radio into a digital signal for proper audio through the factory amplifier. The module uses a high-quality Wolfson digital to analog converter (DAC) to ensure excellent sound quality.