Now, accordions have the ability to switch with ease between two voices and are constructed in various methods to increase durability and stability. Construction The accordion has three universal components body, pallet, and bellows and many other parts that are variable. The body is made of two wooden boxes joint by bellows. It became popular and had seventeen frets and a length of nineteen to twenty-one inches around 1910. In the middle of the 1920 s, the tenor had 19 frets and was twenty-two to twenty-three inches long. The rarest type is the cello banjo. It has the same range as the mandocello and cello and is tuned one octave lower than the tenor banjo. It also has the same construction and appearance as an electric guitar but it has a longer neck, a larger body, and a longer scale length. The bass guitar could be fretless or fretted but fretted basses are more commonly used. It could either be acoustic bass or electric bass. History The first electric string bass that is also similar to the modern bass was invented by Paul Tutmarc of Washington around 1930. The French later on developed into a four-piece musical instrument. During the time of Mozart, it had six keys but, during Hayden s, the 17 to 24 key versions arose. It elevated its status in the orchestra during the 18th century wherein orchestral and major solo music was made for it. Bassoons for military bands, tenoroons, and sub contrabassoons were created in the 19th century. It is the foundation for various other wind instruments and is groundwork for learning mouth control for playing instruments other than the bugle. Unfortunately, it can only play notes in the harmonic series. Modern bugles are made of copper or brass and are nearly exclusive to the military. These are pitched in B flat just like the trumpet. A person who plays it is a clarinetist. The Clarinet is usually wooden and vertically played. It has a wider bore which has a single reed and this, when activated, vibrates against a removable mouthpiece. Traditionally, the wood used is granadilla wood from South America, Africa, or Asia. Nowadays, it is most common as a B-flat clarinet which is about sixty centimeters in length.