Here the converter itself:


in exploded view (without casing):


socket set ("Tulip") and make a hole to be able to lay fiber optic cable. Do not forget when drilling the housing use a vacuum cleaner!

Choose a location where it will be mounted converter (+ 5V - we take out the power cord SSD):


Because our rock band - two keyboard and used besides Kronos still three keyboards, you need a device that will combine the the signals from each of MIDI keyboards into one cable coming to the MIDI input of KRONOS. All keyboards work on different MIDI channels. We have long been here use such a device (well proved in the work and does not require a separate power supply):



Prepare in the housing KRONOS holes for the four MIDI sockets:


I installed one MIDI socket - different from the others, to always know that it is receiving power through the device.
Choose a place where the unit will be installed:

The output of the merger - we to solder to the board KRONOS (MIDI input).
Here is the result. Everything works!

