Amazon.com: CME U6MIDI Pro - MIDI interface with router and filter - plug-and-play USB MIDI for computer - 3-in-3-out MIDI with Merge. Split, Thru : Musical Instruments
Sipario Advanced MIDI Router by Lab4Music to Control Keyboards & MIDI Devices | eBay
Amazon.com: CME U6MIDI Pro - MIDI interface with router and filter - plug-and-play USB MIDI for computer - 3-in-3-out MIDI with Merge. Split, Thru : Musical Instruments