Kermanshah horn: Double-layer instruments with double sound tubes are instruments that are made of a wide part of a special straw and are doubled. horn, Karna and ballaban are among these instruments. horn have a sound tube with a funnel or trumpet. The Karna differ from the horn in terms of shape, structure, the range of sound, and the type of material used. In some parts of Iran, horn is known as Saz, which is common in all parts of Iran except Turkmen Sahara. East areas have unique features that include: smaller size, narrower trumpet mouth, lack of tongs or twigs, and more sound width. This type of horn is common in Taybad, Khaf, Torbat-e Jam and to some extent in Sarakhs. Appearance: Cylindrical body: The body of the cylinder is made of wood with seven holes in the front and one hole in the back. The body of Khorasanhorn has a hole in the side of the body that cannot be pointed. Trumpet- shaped opening: It is made of same material used for body and is limited. rod: Made of brass and free of twigs or clamp to connect the shaft to the body. The rod is located directly in the upper opening and is a thin brass tube on which the tongue is attached. The other side of the shaft is located in the upper hole of the body. Tongue: It is made of straw and is attached to the upper part of the shaft. Lipstick: Made of wood, metal, shell, plastic or bone. The lipstick has a hole in the middle that is where the rod passes and stabilizes in the musician's mouth. Executive technique: horn executive technique is breathtaking and has a wider and smaller audio range. It is possible to perform the song in the following areas and above with it. In general, the implementation of horn in Khorasan and eastern Iran is more complicated than in other regions. The sound range of the eastern horn of Khorasan is in the form of the suprano sounds and can be changed by changing the blowing pressure and the way of piercing the holes. administration: At weddings, celebrations are played with the drums. It is used in the performance of game and dance officials such as Choob Bazi, Afar, Hatan and local wrestling, as well as the performance of the Magham of Allah and the performance of the song Koravoghli