The wordsorna is a Pahlavi derivative of sūrnāy, which is a compand of 'sūr-' and '-nāy'. Possibly it was called "strong flute" due to its double-reed-construction rather than usual nāy, which was made of a single tube of cane. Also it is suggested that the first part of word of sorna, is from sūr- again from Pahlavi and New-Persian, meaning the "banquet, meal and feast", thus the "banquet-flute". It is also suggested that "Sorna" is a cognate of "Horn", as "Sorna" simply means horn. This is a result of the Centum-Satem isogloss, and later Grimm's Law. Even in Persian there is another wind instrument whose name appears to be a cognate of both "Sorna" and "Horn", called "Karna" ; this may stem from a re-borrowing from another language.
History
The instrument's history dates back to the Achaemenid Dynasty, and was used to play at the end of the day from the city gate or from the local administration building. This custom persisted in England until the 19th century, the town waits playing shawms to mark the hours. The instrument was mainly played in outdoors in regional music of Iran in the festive ceremonies. The Achaemenid sorna was a large trumpet-like instrument, but in later dates was reduced in size, and became more like, or dozale, which is characterized by a turned wood body of simple shape, with a heavily flared bell. The earlier was categorized as a trumpet, but this was a mistaken idea based on the bell of the oboe and the freeblowing embouchure that often gives a superficial resemblance to a brass embouchure, particularly if the oboe is fitted as so many are with a lip ring. According to the Shahnameh, it was King Jamshid who devised the Sornā. Except the literary evidences, there are also number of artefacts from Sasanian dynasty, depicting Sorna, such a silver dish, currently in Hermitage Museum.
Function
A small amount of air is forced under pressure through a small metal tube called the staple which serves to hold the reed and match it to the bore. This requires the player to make sure, as in oboe playing, that one also empties the lungs of stale air when taking a new breath. Often sornas were played in pairs, with a melody and a drone player. This drone may move to different notes during a piece of music, changing at prescribed places in the composition. Several other names, such as dohol, davul, tavel, and so on have been applied to the sorna. Since dohol is a double-faced drum sometimes it is called do-rūyeh in Persian language, in contrast to ghaval and daf, which are yek-rūyeh.
