MOTU MIDI Express 128. Great (if not the best) midi usb interface.. Mainly working ITB these days (and in the modular) so no need for that much MIDI.. PS (you will need to get a USB-B to USB-A cable to connect it to your computer). MOTU MIDI Express 128 is a 8-in/9-out MIDI interface compatible with Macintosh and Windows. Built from the same technology found in MOTU’s flagship MIDI Timepiece, the MIDI Express 128 is a professional MIDI interface that provides plug-and-play connectivity to any USB-equipped Mac or Windows computer. The Express 128 provides 8 MIDI IN, 9 MIDI OUT, 128 MIDI channels and compatibility with all Macintosh and Windows software. The MIDI Express 128 takes full advantage of USB, giving you high-speed MIDI throughput, sub-millisecond timing accuracy, support for “hot-swapping” and plug-and-play expansion. And the Express 128 is powered by USB – no wall wart or AC plug. No other MIDI interface offers this much value and performance at such an affordable price. Features MIDI connectivity – Provides eight independent MIDI inputs and outputs for a total of 128 MIDI channels.