Go to the Windows Sound Control Panel. Ensure the USB audio device associated with the NPG card is enabled and set as a recording device. In OBS, check "Use custom audio device" under the video capture properties to link the video and audio tracks directly.
Composite Video (Yellow RCA), S-Video, and Stereo Audio (Red/White RCA). Output: USB 2.0 interface. npg real dvd studio iii drivers verified