glued together, unlike Andean versions, which are usually tied together. Thus, the player can easily reach all the notes by simply swiveling the head, or by moving the instrument with the hands. These instruments can also play all the sharps and flats, with a special technique of both tilting the pipes and jaw movement, thus reducing the size of the pipe's opening and producing a change in pitch. A very advanced player can play any scale and in any key. There are two styles of vibrato possible, hand vibrato and breath vibrato. In hand vibrato, the pitch is shifted up and down, like a vocal vibrato. The player gently moves one end of the pan flute (usually the high end) somewhat similar to violin vibrato. Breath, or throat vibrato, which is more accurately described as a tremolo or volume swell, is the same technique used by players of the flute and other woodwinds by use of the player's diaphragm, or throat muscles. Variations The curved-style pan flute was popularized by the Romanian musician Gheorghe Zamfir, who toured extensively and recorded many albums of pan flute music in the 1970s, and by several other artists who began recording at the same time. Today there are thousands of devoted players across Europe, Asia and the Americas. Both the curved and traditional South American variations are also very popular in Peruvian traditional groups and other Andean music. In Laos and Thailand, there is a cylindrical version called the wot, used in folk music from the Isaan region of the country. The player alters notes by rotating the instrument with the hands, rather than by head movements. Some new designs are beginning to appear, as designers and makers take advantage of computer-aided design and 3D additive manufacturing, to move past the limitations of traditional tool and materials. These new pan flutes address some long-standing issues to make it an easier instrument to learn and to play accurately. Types Paixiao Wot Nai (Romania, Moldova). Siku Kuvytsi, Svyryli, Rebro, Nai (Ukraine) A small panflute called chiflo or xipro was used by Galician mobile knife sharpeners in Portugal, Spain, Argentina and Mexico, who blew quick, loud scales to announce their arrival in the neighborhood. They were traditionally bored from a block of wood, but more recently have been cast in plastic. The firlinfeu is a popular folk instrument in Brianza, the province of Monza and the southern