Đàn môi

The lamella is...cut into the material,...such as...the brass dan moi from the Hmong people in northern Vietnam and Cambodia.

...To play...the instrument is held against the lips to connect it to the sound-box (the mouth cavity) and the action of the lamella is triggered...by plucking.

[3]This gives much more flexibility to the player, leaving them freer to shape their oral cavity as a resonance chamber to amplify the instrument.

The well-sold dan moi from Vietnam derives from the mouth harp of the Hmong who live dispersed in mainland Southeast Asia.

The instrument is of high-quality brass and is usually enclosed in a wooden or bamboo tub of the same length in order to prevent injury when being carried in the pocket.