What is the function of the Sony/Philips Digital Interface (S/PDIF)?

The Sony/Philips Digital Interface, commonly abbreviated as S/PDIF, is specifically designed to facilitate the transfer of digital audio signals between devices. This interface enables high-quality sound transmission without the need for converting the audio into an analog format, thus minimizing signal degradation and noise that can occur during conversions.

S/PDIF supports various audio formats, including stereo and multi-channel audio, and can utilize either coaxial (electrical) or optical (fiber) cables to transmit the digital audio signal. This capability is particularly beneficial in home theater systems, audio receivers, and various consumer electronics that require high-fidelity audio transmission.

The other options pertain to functionalities that are not supported by S/PDIF. For instance, it does not transfer video signals or transmit Wi-Fi signals, nor is it used to connect gaming consoles in a direct manner, although consoles may use S/PDIF for audio output in certain setups.