Design and implement a USB MIDI driver for Android Csound. This should be part of the AndroidCsound library. The user will use an "OTB" adapter (micro USB male to standard USB female) to connect a class-compliant USB MIDI interface and MIDI controller to an Android device. Csound will then receive MIDI messages in the same way as with other MIDI interfaces.
A possible resource for this driver is: https://github.com/nettoyeurny/btmidi. This also implements a Bluetooth MIDI interface.