What is S/PDIF and how can you connect your digital devices with it?
What is SPDIF and How to Use It?
Understanding SPDIF
- The Sony Phillips Digital Interface (SPDIF) is a digital audio connection that can transmit either two channels of uncompressed audio (stereo) or compressed multi-channel audio (5.1 and 7.1 surround sound).
- SPDIF can be transmitted through two types of cables: optical cables with Toslink connectors and coaxial cables with RCA connectors, commonly found in consumer entertainment systems.
- Devices may label SPDIF ports simply as "Optical In" and "Optical Out." Newer TVs often have only a digital SPDIF output, necessitating the use of a Digital to Analog Converter (DAC) for connecting to analog systems.
Connecting Devices
- A DAC converts digital input into an analog stereo output, allowing connections to analog Hi-Fi systems like amplifiers with passive speakers or active powered speakers.
- Links will be provided in the description for necessary cables and examples of basic DACs to assist users in making appropriate choices for their setups.
Application in Recording Studios
- In recording studios, both optical and coaxial SPDIF are prevalent on many audio interfaces, facilitating direct connections from digital synthesizers, guitar effects pedals, modeling amps, and other outboard digital effects units.
- Using SPDIF bypasses unnecessary conversions between digital and analog formats while freeing up analog inputs/outputs on interfaces for actual analog connections.
Important Considerations