Conductive Labs MRCC MIDI Router Control Center - Perfect Circuit
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
ESI M8U eX 16-Port USB 3.1 Gen 1 MIDI Interface ESI-M8UEX B&H
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