Scanners are typically used to convert what into digital format?

Scanners are designed to convert physical documents into a digital format, which allows for easier storage, sharing, and editing. They work by capturing the image of a physical document, whether it be text, photos, or other graphical elements, and then translating that information into a digital file that can be manipulated on a computer. This conversion process is vital in various applications, including digitizing paper records for archiving or facilitating electronic document management systems.

The other options do not align with the primary function of scanners. Audio signals are typically converted using different devices like microphones or audio interfaces, while video files are captured through cameras or video recorders rather than scanners. Hence, the focus of scanners is specifically on physical documents, making this choice the correct one.