The USB MIDI Monitor lets you view all incoming MIDI events from your USB MIDI interface. The events are timestamped and the event type, MIDI channel and values are displayed in a scrollable table. For control changes, extra information is displayed if the control change is a known type like volume or panning.Note that this app requires the following items:* Android 3.2 or higher* Tablet or phone with USB host support* USB MIDI interface that works without drivers on Windows or OSX* If your device has a micro-USB connector: a micro-USB to USB OTG cable (around 7 to 10 euro)* No rooting or special drivers required!!Tested Android devices:* Allwinner A13* Sony Tablet S* Acer Iconia A200* Acer Iconia A500* Asus Transformer Prime TF201* Asus Transformer TF101* Asus EEE slider* Sony XPeria S (with Android 4 update)* Galaxy S3Tested USB MIDI interfaces / devices:* Cakewalk / Roland UM-1G* CME M-Key V2 Midi Keyboard* Edirol UM-2EX* The 5 euro ‘Hong Kong’ interface (note: this one drops MIDI events if they are coming in too fast!)* Korg Nanokey 2* M-Audio Keystation Mini 32* M-Audio Keystation 61* M-Audio Pro keys sono 61 * M-Audio MIDI One* EMU Xboard 61* Denon MC-6000If you have more devices or interfaces that work, please drop me an email.