The keyboard 2 book had a special Mainstage scene dedicated to sending Note On messages on its lowest key, which were sent up to the QLab host machines at front of house. Performing a MIDI dump command gave me information about how each contact closure port was programmed (what sort of MIDI events it was looking for to close and open the connected relays). The backbone of the controls were a pair of MIDI Solutions R8 relay array controllers. As this was rented equipment from the Broadway production (Roundabout Theatre at Studio 54), the challenge was to do a bit of reverse engineering, as the gear shipped without operating instructions. I recently assisted Chris Walker with Holiday Inn at the 5th Avenue Theatre, where I set up a MIDI-controlled relay array for LED/solenoid valve effects in “Let’s Say It With Firecrackers”.
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