[Piano] examine the keyboard press from the codename PC software

“MIDI Chord Helper” is the recommended software examine the keyboard from the codename of the music press.

Steps:

1. The codename of the music-PC
   Software is useful to examine whether any keyboard press
   　It is a “MIDI Chord Helper”.
   Coming at the keyboard, and enter the codename press keyboard signs
   　Soon to come. Also, other features also pretty good.