The RME OPTO-X is an optional extension board for the HDSPe MADI FX triple MADI card with full functionality.
A few words about the HDSPe MADI FX card
The HDSPe MADI FX marks a new milestone in the history of audio interface cards. Never before has such a high-performance multi-channel audio system existed. The HDSPe MADI FX features 390 audio channels, three MADI I/Os (two optical and one coaxial), unique low latency performance, redundancy mode and internal effects.
Like the standard extension board it comes with Word Clock I/O and a D-sub connector for MIDI and AES I/O.
The standard coaxial MADI I/O is replaced by an optical MADI I/O. Using the OPTO-X the HDSPe MADI FX then has three optical MADI I/Os.