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Digi OS Upgrades: Class Compliant USB Audio & MIDI - YouTube
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Amazon.com: ESI M8U eX: 16-Port USB 3.0 MIDI Interface - Class-Compliant, Plug-and-Play Connectivity for PC/Mac, with Standalone Functionality & Integrated USB Hub, Includes Free Cubasis LE for iOS : Musical Instruments
Using the USB Audio Class Driver – Best Practices and Common Pitfalls - ppt download