The didgeridoos that are in demand are those measuring from 1 meter to 1.6 meters. The lowest tones that could be heard from these are in the range of 70 to 100 Hertz. Ceremonial presentations One of the most popular rituals in Arnhem Land is the Narra ritual. Its songs are commonly accompanied by large paired sticks that are slowly beaten. It is similarly designed with the piano which has the ability to play each tone in all octaves. Traditionally, it has eight to sixteen holes in intervals of two. The regular chromatic harmonica uses the slide to produce some of the notes in a complete chromatic scale which is recurring at each octave. Bagpipes mostly consist of one or more drones. It is a cylinder-shaped tube with usually a single reed. It has at least two parts and has a sliding joint or bridle which manipulates the pitch. Construction A constant air supply is provided by the bagpipe s construction. The air flow could be maintained in the chanter and drone pipes through using the left hand to squeeze the bag during breathing periods. The zither gamily consists of many stringed instruments like the guitar, lute, and kantele. Despite that, others regard the zither and lyre as members of two different classes. The difference is that the strings of the lyre stem from a somewhat common area of the soundboard while the strings of the zither are spread across most of the soundboard. Before 1730, clavichords were created small with four octaves and a length of approximately four feet but nowadays, these are made with a length of up to seven feet. Nowadays, clavichords are manufactured all over the world and have many buyers in the market. A few modern manufacturers are the British Peter Bavington, Swiss Thomas Steiner, American Charles Wolff, and Belgian Joris Potvlieghe. One more is the fipple flute which has a duct that maneuvers the air onto the edge. Fipple flutes are easier to play and has a distinct timbre compared to other flutes. Here are the categories of flutes based on origin: 1. Western concert flutes The western concert flute is a descendant of the German flute.