[LAU] 'Modular' midi controller for keyboard

[Ralf Mardorf]

PPS: My apologise, I assume that a "master keyboard" won't benefit from
options such a device could provide, e.g. splitting the keyboard etc.
should be able by the master keyboard, such as sending a CC to switch a
new setup for such an additional MIDI device. I always would avoid MIDI
thru for a master keyboard and prefer several cables from and to the
computer instead.