Dual port card supporting two streams of 64 channel bi-directional 24-bit 48kHz serial digital audio transmission using two 75 ohm coaxial cables per port. Daisy chain or split signals to multiple devices, sync with either stream or an external word clock. The second port can be configured as an independent stream or as a redundant backup connection using a second cable. Signals from either stream can be routed to the iLive channels in blocks of 8. M-MADI is one of a range of digital audio networking options available for iLive and GLD to enable integration with other systems, digital mic splitting, multi-track recording and system expansion.