The MIDI Standard: Introduction to MIDI and Computer Music: Center for Electronic and Computer Music: Jacobs School of Music
USB-IF Publishes USB Device Class Specification for MIDI Devices v2.0 | audioXpress
Step 2: Setting up your MIDI system
With Android: how to sync Soundbrenner Pulse & Core to DAWs – Soundbrenner Support
Arturia - KeyStep Quick Start
Configuring Your Soundcard and MIDI Equipment > Procedures for Common MIDI Configuration Tasks > Installing a USB or MIDI Cable Between Your Soundcard and Keyboard