The Sony/Philips Digital Interface specifies a standard for digital audio interconnect for consumer level gear. S/PDIF interfaces are often found on CD players, DAT decks and minidisc gear.

Sampling rates up to 48kHz are supported and the standard includes a copy-management system, SCMS. The signal is either transmitted electrically, in which case standard RCA connectors and cables are used, or optically, where special toslink connectors and fiber optic cables are used.

The data formatting used in S/PDIF is very similar to the professional digital audio standard, AES/EBU.