In order to add signals to BLU Link System, DBX and Soundcraft have co-developed BLU-SI Link Card that slots into the back of the console to allow direct access to the network. DBX BLU-SI Link Card allows access to the BLU link network without the need for analogue inputs and D/A and A/D conversion. This way an Si Expression, Si Compact or Si Performer console can accept signals from the network, process and mix them and return them to the network.