A DAC, or Digital-to-Analog Converter, is an electronic device that converts digital signals into analog signals. This process is essential for playing digital audio files, as most speakers and headphones require analog signals to produce sound. DACs are commonly found in devices like smartphones, computers, and audio equipment. In addition to audio applications, DACs are also used in various fields such as telecommunications and video processing. They play a crucial role in ensuring that digital data, which is represented in binary code, can be transformed into a format that can be understood and utilized by analog systems, such as speakers and televisions.