KeySigPiano 乐调钢琴 (YueDiaoGangQ

Features KeySigPiano 乐调钢琴 (YueDiaoGangQ

Make it easier to play JianPu (numbered music notation) music.
A user can set music key signature.
In accordance with the setting, the seven keys corresponding to the natural musical scale are displayed using distinct colors.方便弹奏简谱乐曲。用户可设置调号。根据设置的调号，对应简谱七个自然音阶的按键会以不同的颜色显示。