What device can be used to capture video and audio files from a memory device?

A card reader is a device specifically designed to read data stored on memory cards, such as SD cards or microSD cards, which are commonly used in cameras, camcorders, and other portable devices. When you connect a card reader to a computer, it allows for the transfer of video and audio files stored on the memory card directly to the computer for editing, storage, or playback.

Other devices listed, such as a digital interface, composite cable, and video converter, serve different functions. A digital interface typically refers to connections like HDMI or USB that allow for the transmission of digital signals, while a composite cable is used to carry analog video signals and may not facilitate file transfer from a memory device. A video converter, on the other hand, is used to change the video format from one type to another and does not interface directly with memory devices to capture files. Thus, a card reader is the most suitable choice for capturing audio and video files directly from a memory card.