“降半音”用英语怎么说

“降半音”的拼音为：jiàng bàn yīn...

这首曲子我弹不来 -- 降半音音符太多了.I can't play this - there are too many flats.我误读了乐谱上的b降半音音符.I misread the b flat note on the sheet.有很多升半音、降半音难度很大的钢琴曲.A difficult piano piece full of sharps and flats....