CME WIDI Bud Pro Bluetooth USB MIDI Dongle WB00B11 B&H Photo
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CME U2MIDI Pro: USB to MIDI cable with MIDI routing and filters
Code USB MIDI in CircuitPython | Grand Central USB MIDI Controller in CircuitPython | Adafruit Learning System
Interfacing Linux: Cheapest USB-MIDI Adapter On eBay – Linux Game Cast
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Amazon.com: CME WIDI Uhost - Bluetooth USB MIDI Interface + USB host for Class Compliant USB MIDI Instrument, MIDI Controller, MIDI Keyboard, Windows, Mac, iOS & Android, Linux, ChromeOS : Musical Instruments