MIDI Solutions MIDI Event Processor
If you need to map, filter, and process MIDI events in specific ways, the MIDI Solutions Event Processor may be exactly the solution you are looking for. The Event Processor offers 10 settings, each of which can be programmed with a unique MIDI processing function (for 32 settings see the Event Processor Plus). By combining these settings the Event Processor becomes an extremely powerful tool capable of processing MIDI events in almost any way imaginable. You can map MIDI events or ranges of MIDI events to other MIDI events, filter MIDI events or ranges of MIDI events, trigger MIDI events, toggle between MIDI events, sequence through MIDI events, scale or crossfade MIDI messages, transpose notes, scale velocities, map to and from System Exclusive, NRPN, Bank Select messages, store incoming values in variables for later use... the Event Processor is like a swiss army knife of MIDI processing products, an indispensable tool in any MIDI musician's arsenal.

The Event Processor works by comparing each incoming MIDI event with each of its 10 settings. When an incoming MIDI event matches a setting, the event is processed according to that setting. By combining different settings for different incoming events, the Event Processor becomes an extremely powerful tool capable of achieving a wide range of MIDI-processing functions.

Following is a list of the Event Processor's functions, but better yet download the Event Processor Programming Tools software and read the Guide to the Event Processor and Event Processor Plus by Bruce Wahler of Ashby Solutions. The Programming Tools software is free for download, quick to install, and contains lots of examples that demonstrate the many applications of the Event Processor. And the Guide to the Event Processor and Event Processor Plus is a comprehensive guide that makes it easy to understand everything these amazing products are capable of!

The Event Processor is programmed by sending it MIDI System Exclusive messages This is easily done with the Event Processor Programming Tools software. Once programmed, the Event Processor's settings are retained even after power is removed. The Event Processor can be reprogrammed with new settings as often as needed.
The Event Processor is MIDI-powered, and requires no batteries or power supply to operate with most products. A MIDI indicator LED lights up when the product is powered and flashes when MIDI data passes through it.