MIDI keyboard for playing notes on external MIDI devices laptops or other MIDI apps.

This app does not produce sound by itself. It is not a synthesizer. It is just a MIDI controller that can be used with a synthesizer.

To connect to a laptop:
- Drag finger down from top of Android screen.
- Select "USB for Charging" icon.
- Select "MIDI".
- Launch this "MIDIKeyboard" app.
- Select "Android USB Peripheral Port" from "Receiver for Keys" menu at top.

This may be used by software developers or OEMs to test the Android MIDI feature.
Instructions and links to source code are here:
https://source.android.com/devices/audio/midi_test