The is a series of audio cards manufactured by Crystal Semiconductor (later acquired by Cirrus Logic) that were commonly used in desktop computers during the late 1990s and early 2000s. These audio cards provided sound processing capabilities for PCs, offering high-quality audio playback and recording functionality. The "PCI Audio Accelerator" refers to the sound card being connected via the PCI (Peripheral Component Interconnect) bus, which was the standard interface for expansion cards on older PCs.

The is the software that allows your computer to properly interface with this older sound card. Installing the driver ensures the system can recognize the card and use it for tasks such as audio playback, recording, and enabling full functionality in audio applications.