What is an example of digital-to-analog (D/A) conversion?

What is an example of digital-to-analog (D/A) conversion?

• A. Exchanging digital data back to sound to play through headphones
• B. Storing digital data
• C. Compressing video data
• D. Modulating radio waves

Answer: (A)

Turning digital data into a form that can physically interact with the world is what a digital-to-analog converter does. In the case of audio, digital audio data contains samples of sound stored as numbers. The digital-to-analog converter reads those numbers and creates a continuous electrical signal that varies smoothly with time. This analog signal can then be amplified and sent to headphones or speakers to produce sound. So, exchanging digital data back to sound to play through headphones is a clear example of D/A conversion because it takes discrete digital values and converts them into a continuous analog signal that can drive listening devices. The other options stay in digital form (storing data, compressing video) or relate to preparing signals for transmission rather than producing a direct analog output for listening.

Turning digital data into a form that can physically interact with the world is what a digital-to-analog converter does. In the case of audio, digital audio data contains samples of sound stored as numbers. The digital-to-analog converter reads those numbers and creates a continuous electrical signal that varies smoothly with time. This analog signal can then be amplified and sent to headphones or speakers to produce sound. So, exchanging digital data back to sound to play through headphones is a clear example of D/A conversion because it takes discrete digital values and converts them into a continuous analog signal that can drive listening devices. The other options stay in digital form (storing data, compressing video) or relate to preparing signals for transmission rather than producing a direct analog output for listening.