MRG2

This mini board is MIDI control electronics converting multiple keyboards, or sets of potentiometers into MIDI. It has no keyboard scanning ability on board, instead it works with up to 5 scanners of any kind. Equipped with scanners it creates midi hardware required for up to 640 keys in 10 keyboards plus 64 potentiometers and 100 dual-line character displays. Typical applications are MIDI controller for VTPO (Virtual Theatre & Pipe Organ) like Hauptwerk, MidiTzer, as well as custom MIDI controller surface for Ableton Live, or Reason and many others

Features:

MIDI merge input for stacking with any existing MIDI equipment
5 inputs for connecting keyboards or potentiometers scanner
user defined split point independent for each keyboard
user defined key range for each keyboard/split
user defined MIDI channel for each keyboard/split and analog input
user defined MIDI event type for each keyboard/split and analog input
Program Change via numeric keypad
recognizes Hauptwerk text messages and puts them in MiDisp, and miniLCD
can control LEDs of LTSC module with incoming MIDI notes
configurable via the KEYPAD or MIDI System-Exclusive messages
all settings stored in nonvolatile memory
firmware upgradeable via MIDI SysEx file
onboard MIDI DIN sockets
requires 5-12V DC power supply, current consumption widely depending on number and type of scanners used (5-300mA)
dimensions 71 x 32mm (2.8'' x 1.3'')
more marketing talk

The board shown above has 5 connectors for scanners, two MIDI sockets, and screw terminal for power supply. There is also 6-pin header for connecting the "EDIT" button, and optional external activity LEDs. There can be 5 chains of keyboard scanners (only up to 2 per chain), and 1 chain of potentiometer scanners (up to 64 pot inputs total).

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