相关说明：
Bass-贝司谱
Drums-鼓谱
Guitar-吉他谱
Keys-合成器谱
LS(Lead Sheet)-和弦+主旋律谱
LCC(Lyric Chord Charts)-歌词和弦谱
PVG(Piano Vocal Guitar)-钢琴人声吉他谱
NNS(Nashville Number System)-级数和弦谱
RTF(Rich Text File)-富文本歌词
OHT(Overhead Transparency)-歌词
PC(Pro Charts)-纯和弦谱
Strings-弦乐谱
Brass-管乐谱
