借鉴高人源码，加载键盘弹奏代码，制作而成的鼠标、键盘双操作的MIDI电子琴。-Learn Gao Ren source, load the keyboard playing the code, made of a mouse, keyboard, dual-action MIDI keyboard.

读取midi文件，以钢琴卷帘方式展现，也可使用鼠标操作(it will load midi files and show the notes like waterfall)