Mandolin are used. Usually, courses of 2 adjacent strings are tuned in unison. By far the most common tuning is the same as violin tuning, in scientific pitch notation G–D–A–E, or in Helmholtz pitch notation: g–d′–a′–e″. Note that the numbers of Hz shown above assume a 440 Hz A, standard in most parts of the western world. Some players use an A up to 10 Hz above or below a 440, mainly outside the United States. Other tunings exist, including "cross-tunings", in which the usually doubled string runs are tuned to different pitches. Additionally, guitarists may sometimes tune a mandolin to
Sintir knuckle side of the index finger and the inside of the thumb. The hollowed canoe shaped wooden body resonates a percussive tone created by knuckles slapping the camel neck top of the body while the thumb and index finger are plucking the strings.The lowest string on the sintir is a drone note and the second string, the highest in pitch, is tuned an octave higher and is never fretted. The third string is tuned a fourth above the drone. The buzzing sound often heard emanating from the sintir is caused by metal rings dangling off of a galvanized metal feather