A morsing (also mourching or morching) is a percussion instrument, mainly used in the Carnatic music of South India. It can be categorized under lamellophones, which is in the category of plucked idiophones. It consists of a metal ring in the shape of a horseshoe with two parallel forks which form the frame, and a metal tongue in the middle, between the forks, fixed to the ring at one end and free to vibrate at the other. The metal tongue is bent at the free end in a plane perpendicular to the circular ring so that it can be struck and is made to vibrate. This bent part is called the trigger.

The morsing is an Indian version of the Jew's harp. Its origin in India is not very clear though many myths and stories prevail. In India it is found mainly in South India, Rajasthan and also in some parts of Assam. In South India, where it is called morsing, mourching or morching, it features in Carnatic concerts and percussion ensembles. In Rajasthan it is called a morchang and is used as percussion instrument in folk music.

Playing technique
The morsing is placed between the teeth and held firmly in the hand and is struck using the other hand to produce sound. Movement of the player's tongue, variations of the throat and blowing and sucking of air through the instrument produces different sounds or overtones.

The morsing is firmly held in the hand, the frame or the ring between the palm and the fingers usually in the left hand. Care should be taken to see that the middle part or the metal tongue is not being touched when held idle. Then the two parallel forks are gently pressed against the front upper teeth. The trigger is plucked with the tip of the index finger. Sound is produced due to the vibration of the metal tongue of the morsing in the mouth and the throat cavity. Movement of the player's tongue with constant plucking can produce very fast patterns of sound. By constricting the space in the mouth and throat many variations of sound can be produced.

Tuning
The basic pitch of the instrument can be varied very little. Significantly, the pitch of the instrument can only be reduced and not increased. To reduce the pitch a little, bee-wax can be applied on the plucking end. To increase the pitch, it can be filed, although this may damage the instrument.