A digital-to-analog converter (DAC) is an electronic device that transforms digital signals, which are represented as binary numbers, into analog signals. These analog signals can take various forms, such as voltage or current, and are essential for applications like audio playback and video display. DACs are commonly found in devices like smartphones, computers, and televisions. DACs work by interpreting the digital input and generating a corresponding continuous output signal. The quality of a DAC can significantly affect the performance of audio and video systems, as it determines how accurately the digital information is converted into a form that can be perceived by human senses.