By adding option cards to the Soundcraft Si range of digital consoles, you can interface your desk with a multitude of analogue and digital systems. The Si range of consoles features a versatile 128 channel expansion bus offering 64 discrete additional input sources and 64 additional output patches that may be used in parallel to fan-out to multiple destinations. Routing from the cards to the processing channels and from channels or buses to the option card buses is achieved via the `Patching' functionality. Further cards in development will provide AVB, Dante and BLU link interface capabilities.