Midi Stop Controller Adds bi-directional Midi Stop control functionality to Allen Organs Direct plug-in replacement for Allen DM series Memory Capture boards Use organ's existing Capture Memory power supply Handles 4 stop divisions Controls up to 128 Stops Supports standard Allen pistons Up to 20 additional inputs for expansion1 4 analog inputs Midi In, Midi Out, Midi ThruLegacy standalone, split, and full MIDI modes of operation. Compatible With Hauptwerk and other Virtual Pipe Organ Software Adding full midi functionality to Allen organs using the DM series memory capture boards just became easier. Simply unplug the old board and plug in our DM-MIDI board in its place and you have full bi-directional stop control for your virtual pipe organ in minutes - no wiring or additional modifications required! Bi-directional control means that stop changes made on your physical console are sent as Midi messages to your virtual organ and that stop changes on your virtual console are reflected back on the physical console as actual stop movement ensuring that your virtual and physical console are in perfect sync. shows the playback of a Midi file on Hauptwerk. Hauptwerk sends midi messages to control the stops on the physical console, in this case a MOS-2 Allen Theatre Organ with the DM Midi board installed. Operational FlexibilityThe DM MIDI board automatically switches between three modes of operation to suit any performance scenario.When you use the DM MIDI board in the full MIDI mode, you're freed from the limitations of the old dual memory system and free to enjoy the vastly superior multiple bank memory systems, including stepper sequences and scoped pistons, provided by modern MIDI VPO software In this mode the DM-MIDI board moves the capture memory off of the board and onto your computer to be managed by your VPO software.  The legacy standalone mode provides the same dual level combination setting capability as the original board using onboard non-volatile memory for those instances when you want to play without connectivity to any external MIDI devices.The split mode also utilizes the board's internal dual level capture system but sends MIDI stop and piston information messages allowing the combination action to be used with MIDI devices and software lacking capture capability.Also on board are four analog inputs that can be use for expression pedal control or other analog functions supported by your VPO. Two of the inputs are designed to be used with Allen LDR expression pedals, linearizing and scaling the motion of your optical expression pedals to provide smooth, linear, midi control over the full range of motion.1Enjoy the full capabilites of your VPO software from the console of your Allen organ. Order your DM-Midi Midi Stop Controller board today! This product is a replacement for DM series dual memory capture boards originally found in some, but not all, Allen MOS-1, MOS-2, ADC, and MADC series organs. Verify that your organ is using a DM series capture board before ordering this product. 1These features require addtional user wiring.