Its sturdy and bus-powered design makes it as easy to use as reliable in operation. MADIface USB is both MADI portability at its best as also a perfect desktop solution to connect MADI equipment to any Mac and PC. A real gem in flexibility, usefullness and trouble-free operation - as you expect it from RME. • Record/Playback channels: 64 in / 64 out • 2 x MADI I/O (optical and coaxial) • TotalMix • No external power supply required • Stand-alone mode operation • Seamless Redundancy Operation