The Crystal CS4299 was an audio codec from Cirrus Logic, compliant with the AC'97 standard. It performed high-quality analog-to-digital and digital-to-analog conversion, supporting sample rates up to 48 kHz and stereo audio channels. Key features included a high-performance DAC and ADC, an integrated audio mixer, power management capabilities, and potential support for 3D audio enhancements. It was widely used in desktop and laptop computers, multimedia systems, and embedded systems. Integration typically involved standard audio interfaces and drivers provided by operating systems or motherboard manufacturers, enabling efficient audio processing for various applications.