Whether you want to duplicate the Allen stop tabs or draw knobs with midi generated sounds (using the Harrison Stops Midi Converter) or simply wish to replace the original Allen sound generator with midi generated voices, this eliminates soldering to the stops wires. You can remove the stops edge connection from the stop board array and plug the edge connector with stop wires into this adapter and if using original Allen voices, plug this adapter into the stop board array. The 3 division per Allen MOS 1 computer - stop board array has the stop contact signals for 32 stops. Now you can simply plug this device as shown and you have 32 stop terminals to access your organs stop switches without any cutting, soldering or modifications to the original Allen organ. You can even play the original stop voices with whatever sound generator you are adding. For multiple computer organs with additional stop tabs (IE separate computer for choir division) two of these will provide up to 64 stop terminals. Has built-in isolation diodes to prevent added equipment from interfering with the original Allen operation.