S/PDIF is an acronym for Sony/Philips Digital Interconnect Format.

This is a multichannel, single connection digital protocol with two standards – Professional and Consumer.

Please refer to the user guide to see which standard is used for your A&H product.

More information can be found online:

http://en.wikipedia.org/wiki/S/PDIF

http://www.sweetwater.com/insync/pro-consumer-s-pdif-standards-explained