In piano music the upper staff usually has a treble clef and the lower a bass clef , the former usually for the right hand and the latter for the left in music for the piano , or for similar instruments 在钢琴作品中,上面的五线谱通常标有高音谱号,下面的五线谱标有低音谱号,在钢琴作品或类似乐器作品中,前者通常为右手弹奏,后者为左手弹奏。