The VIA VT1802S is a high-definition audio codec designed for desktop and notebook platforms, delivering multi-channel HD audio playback and recording capabilities. Developed by VIA Technologies, it supports 8-channel (7.1) surround sound, multiple DAC/ADC streams, and high sampling rates for clear audio reproduction. The codec integrates features such as jack detection, digital microphone support, and S/PDIF output. Connected via the Intel High Definition Audio (HD Audio) interface, the VT1802S was commonly used on cost-effective motherboards, providing reliable sound performance for multimedia, gaming, and everyday computing environments.