The AK4122 is a digital sample rate converter (SRC) with the digital audio receiver (DIR). The input sample rate ranges from 8kHz to 96kHz. The output sample rate is 32kHz, 44.1kHz, 48kHz or 96kHz. By using the AK4122, the system can take very simple configuration because the AK4122 has an internal PLL and does not need any master clock at slave mode. Then the AK4122 is suitable for the application interfacing to different sample rates like Car Audio, DVD recorder, etc.