What is a common use for a DAC?

A Digital-to-Analog Converter (DAC) is primarily used to convert digital signals into analog signals. This is especially important in audio playback and sound systems, where digital audio files need to be transformed into analog signals that can drive speakers and produce sound. The process of converting binary data from audio formats (like MP3 or WAV) into an analog signal allows the auditory experience that listeners enjoy.

In contrast, interpreting data from sensors typically involves an Analog-to-Digital Converter (ADC), which performs the opposite function by converting analog signals from the sensors into digital data that a computer can process. Storing data on a disk does not involve DACs as it relates to data storage in a digital form rather than conversion to analog. Modifying digital content could involve software processes but does not specifically pertain to the role of a DAC, which is focused on conversion rather than editing or modifying digital data directly. Thus, audio playback represents the primary and most recognized application of DAC technology.