Virtually any modern information-capture device—such as a camera, audio recorder, or telephone—has an analog-to-digital converter in it, a circuit that converts the fluctuating voltages of analog signals into strings of ones and zeroes.
Virtually any modern information-capture device—such as a camera, audio recorder, or telephone—has an analog-to-digital converter in it, a circuit that converts the fluctuating voltages of analog signals into strings of ones and zeroes.