You will need an OTG (on-the-go) adapter for your android and a USB-MIDI converter. This app will connect to your MIDI device (sound module, keyboard, ...) through USB or Bluetooth LE / wireless and take you on a musical journey! There are billions of melodies and millions of accompaniments waiting to be found. (Some devices may have a built in USB-MIDI converter; connecting to such devices only requires the appropriate USB to USB cable). (OTG and USB-MIDI converter or USB to USB cable not