The RPA-SPDIF module is a Analog-to-Digital converter designed for use with a RP4.2-HY11 and RP4.2-HY12 and future RP5.2-HY11 and RP5.2-HY12 interface in order 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 playback of audio through the factory amplifier(s). The module uses a high quality Wolfson digital to analog converter (DAC) to ensure excellent sound quality.