The is a sound card produced by Crystal Semiconductor (later acquired by Cirrus Logic). This sound card was commonly used in older PCs and featured integrated audio, MIDI, and joystick ports. The CS4281 model is part of the SoundFusion family, which was designed to provide high-quality audio and 3D sound effects for PC gaming and multimedia applications.

In addition to its audio capabilities, the CS4281 also included a game/joystick port for connecting devices like joysticks, gamepads, and other input peripherals. The Joystick Windows driver specifically enables Windows to recognize and properly interface with the joystick port on the CS4281 sound card, allowing it to function for gaming or other input tasks.