Solid State Logic MadiXtreme 64, PCIe audio card, 1x MADI I/O (optical), 1x Wordclock Connector (Software controlled as Input or Output), Channel count: 56/64 = 44.1/48 kHz, 28/32 Ch = 88.2/96 kHz, 14/16 Ch = 176.4/192 kHz, for PC/MAC, WIN XP/VISTA 32-Bit, MAC OSX 10.4 or 10.5