What is the function of a DAC (Digital to Analogue Converter)?

A Digital to Analogue Converter (DAC) is specifically designed to convert digital signals, which are discrete and often represented in binary data, into analogue signals that can be used in the real world, such as audio or video signals.

This functionality is essential in applications such as audio playback, where digital audio files (like MP3s) need to be converted into analogue signals to drive speakers or headphones. Without a DAC, the digital data cannot be interpreted or used by devices that rely on analogue signals for output.

In the context of the other options, converting analogue signals into digital (the first option) pertains to an Analog to Digital Converter (ADC), while processing audio signals in real-time (the second option) refers to the use of digital signal processors (DSPs). Enhancing digital data storage (the fourth option) does not relate directly to the function of a DAC, as storage does not require the conversion of data but rather focuses on data retention and retrieval. Thus, the primary function of a DAC aligns solely with the conversion of digital signals into analogue signals.