Use the first mouth shape to play single notes and the second one to play chord with tongue block.

吹十孔口琴一般都是用第一种，吹和弦或者使用舌堵法时就要用第二种口形了。

youdao

Use the first mouth shape to play single notes and the second one to play chord with tongue block.

吹十孔口琴一般都是用第一种，吹和弦或者使用舌堵法时就要用第二种口形了。

youdao