The device that converts digital signals back into analog for audio playback is known as a digital-to-analog converter (DAC). DACs are crucial in numerous electronic devices, such as speakers and audio interfaces, allowing digital files to be transformed into sound waves that we can hear. By interpreting binary data and recreating it as analog signals, DACs enable seamless audio playback. The quality of the DAC can significantly affect sound fidelity, impacting the overall listening experience in music and media consumption.