Đàn nhị

The đàn nhị (Vietnamese: [ɗâːn ɲîˀ], Chữ Nôm: 彈二), also called đàn cò, is a Vietnamese bowed string instrument with two strings.

Instruments colloquially referred to as đàn cò are often more similar to the Chinese Erxian Khmer tro and Thai saw duang, while instruments referred to as đàn nhị are often constructed more similarly to the modern erhu of China.

However, in the past, both names referred to what is now generally called the đàn cò.

As well, the traditional handmade đàn nhị have been replaced by Erhus purchased from China in Nhạc dân tộc cải biên ensembles.

The Mường have the cò kè, the Chứt have the t'rơbon, the Khua have the karong, and the Khmer have the tro.