It is made of cane that serves as a membrane to the mouthpiece opening. While the sax is being played, the reed is caught in between the mouthpiece and the saxophone player s lip. The ligature, a rubber-like fabric or band of metal, clamps the reed in place which keeps it from going into the mouthpiece. The Amir Khusru of the 1300 AD was a popular personality and is an image for the Hindustani Sangeet. However, this theory has no historical basis because there was no evidence of the existence of the sitar before the fall of the Moghul Empire. Another theory is that the ancient veenas like the rudra vina were the parents of the sitar. Marion Evans invented the plastic drum head in 1956. Parts The basic parts of the snare drum are the rim, head, drumsticks, snare switch, tension screws, snares, and stand. The rim is the circular edge or lining where the head and other parts of the snare drum are attached. The head is the stretched animal skin or mylar plastic which produces sound when struck with the drumsticks. The trombone in the 20th century In the fist half of the 20th century, the trombone remained popular and widely used in the orchestra through works of various prominent artists like Leonard Bernstein, William Walton, and Richard Strauss. Trombone gained a higher level of significance in chamber and solo music when new composers gave it outstanding parts in their works in the second half of the century. Fortunately, the clavichord was revived by Arnold Dolmetsch in the 1890 s. 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. This made the tuba much less famous in its young stages. Types of tubas The tuba with the lowest pitch is the contrabass tuba which is pitch in B flat or C. Another type of tuba is the bass tuba that is smaller compared to the contrabass and pitched in E flat or F. Its pitch is a fourth higher than the contrabass tuba.