The V-Stream TV878 Audio Capture driver is a piece of software that allows a device, typically a TV tuner card or a video capture card, to interface with the operating system to capture audio and video signals. The V-Stream TV878 refers to a chipset commonly used in TV tuner or video capture cards, often for use in capturing TV broadcasts, analog video signals, or other media sources.

The driver facilitates the communication between the hardware and Windows, allowing the operating system and relevant software (like media center applications or video capture software) to interact with the TV tuner or capture card for recording and streaming purposes. The driver also ensures that the audio is processed correctly alongside the video.