The Trident 4DWave(DX) PCI Audio driver is software that allows Windows to communicate with the Trident 4DWave series of sound cards, specifically the 4DWave(DX) model, which is a PCI-based audio card. The card was used in older desktop computers and workstations to provide audio output (e.g., sound, music, and voice) for multimedia applications, including gaming, video playback, and general system sounds.

The 4DWave(DX) was part of Trident Microsystems' 4DWave line of sound cards that supported a variety of audio formats, including basic stereo, surround sound, and digital audio, for mainstream PCs in the late 1990s and early 2000s.