The function of a sound card primarily relates to which type of data?

The function of a sound card is specifically designed to handle audio data, making it essential for sound playback and recording. A sound card processes audio signals, converting digital audio files into an analog format that can be output through speakers and can also input sound through microphones. This function allows users to experience sound in various formats, including music, voice, and sound effects, which are all forms of audio data.

While visual, text, and image data are handled by other components of a computer system, such as graphics cards and processors, they do not relate to the primary capabilities of a sound card. The focus on audio data underscores the specialized nature of sound cards in ensuring high-quality sound reproduction and audio management for various applications, from gaming to music production.