In most cases, you cannot connect SPDIF directly to Optical without a converter. SPDIF, short for Sony/Philips Digital Interface, is a type of digital audio interface that transmits audio signals between devices. It's commonly used in home theaters, DVD players, and audio equipment to connect devices and transmit high-quality digital audio signals. S/PDIF can. SPDIF remains the most universally compatible digital audio connection standard, making it essential for system integration across different manufacturers and generations of equipment. Well, the answer is both yes and no.