When would you commonly use a Digital-to-Analog Converter (DAC)?

A Digital-to-Analog Converter (DAC) is specifically used to convert digital signals into their analog counterparts. The primary function of a DAC is to take binary data (typically in the form of a series of 0s and 1s) and transform it into a continuous signal that can be used to produce sound, display images, or perform other functions that require an analog output.

In the context of audio signals, a DAC converts digital audio files—such as those from a computer or a digital music player—into analog signals that can be amplified and then played through speakers or headphones. This conversion is vital in audio systems, as humans perceive sound in an analog format; therefore, a DAC is essential for bridging the gap between digital media and our analog sound perception.

While other processes may involve related components, they do not specifically pertain to the function of converting digital to analog signals. For instance, converting audio signals to digital form involves an Analog-to-Digital Converter (ADC), and amplifying voltage signals and measuring analog signals involve different types of devices altogether. Thus, the correct answer accurately reflects the intended use of a Digital-to-Analog Converter.