关于5D音符压音的解释是这样的。5D音符压下来并不是一个标准的半音（mi和fa之间没有半音了），而是一个四分之一音（不是一个标准音），5D压下来声音会有变化，有些曲子里会用到，比如JJ的那首。低调子的口琴应该比较容易压。总之能压就压，不能压就不要勉强，因为这个压音不是很常用的。
The bent note of 5D is not a standard semitone as there is no half note between E and F, instead, a quarter note exists here. Some players such as J.J. use the expression of 5D bend in their music. In a word, "the bent note" on 5D is not commonly used. It is no necessory to make 5D bent reluctantly.
5D音符允许稍微轻度的压音，这种轻微的压音不太可能破坏口琴。有些乐手会在音乐创作中使用这种5D压音的特殊效果，不过这个5D的压音音符不象其他压音使用广泛。
The 5D note allows a small bend. You are unlikely to damage your instrument by bending in this way. Some player use this 5D bend to add extra expression to their music, however this bend is not used as commonly as the ones on other holes.
其实，十孔口琴第五孔里的吸气簧片也没有考虑压音设计。附一张C调十孔口琴的音符分布图：
