The ATI TV Wonder Audio Crossbar driver is a component of the ATI TV Wonder series of TV tuner cards and multimedia devices. The "Audio Crossbar" refers to a software filter used in the system for routing audio signals from the TV tuner hardware (such as a TV signal, video source, or input device) to the appropriate output (e.g., speakers or recording software). This driver is required for the proper operation of the audio functionality in systems with ATI TV Wonder devices, particularly for video and TV applications where the card handles both video and audio signals.

If you're setting up or troubleshooting an ATI TV Wonder card on Windows, installing or updating the correct driver, including the Audio Crossbar, is an important step to ensure audio is properly routed and recognized by the system.