MIDI钢琴模拟软件，里面有MIDI编程的主要思想，内核是由外国人写的，经过了一高手在里面加了注释，总体还是不错的。-MIDI piano simulation software, which has the main idea of ​ ​ MIDI programming, the kernel is written by foreigners, after the master of the inside added a note, the overall is goo