Piano MIDI BLE USB is free Easy and Smart MIDI Connections app. Which allows:
• Control and play your instrument (ex Digital Piano) from your android device.
• Record songs in Midi files
• Play back the recordings
• Play MIDI music files
• [select ]which Midi tracks to play
• Display the sheet music
• Adjust the playback speed
• Learn to play with "Wait mode"
• Highlight the Piano notes as the music is played back
• [select ]which Midi tracks to be displayed on sheet music
• Highlight the sheet music notes as the playback
• Configure the In/Out Midi channels
• Monitor the In/Out Midi events
• Customize a Midi Map for your instrument.
• Manage functions (sounds and controls) even on old instruments

• Ability to save MIDI mode for each connected instrument.
• Improved latency of synthesizer functionality for Android 7 or higher.
• Improved track selection in standby mode.