Then, think about putting a cylinder with a mouthpiece of a regular clarinet at the top on one section and for the other section, imagine placing the alto-clarinet bell. That is how an octavin would roughly look like. A change to the octavin During the young twentieth century, it would seem that the odd shape of the octavin has caught the negative attention of a few instrument designers. From this, two curved arms are projected upwards and are attached at the top by a yoke or crossbar. The body has another crossbar which transfers the strings vibrations. The strings all have the same length so variation in pitch is either accomplished by different sting thickness or by different sting tensions. One advantage of the clavichord over the piano is that it can perform a sound like the vibrato on string instruments. The player can move the key up and down which causes the tangent to also push up and down on the string. This makes the string tighter or looser. This instrument is very mellow and quiet. Because it originated from Naples, the mandolins built centuries back are called Neapolitan mandolins. These have bodies which are almond-shaped and have bowled backs. Its soundtable which is curved provides greater string tension. It has a bridge which is a movable piece of ivory or hardwood placed in front of pins holding the strings. The League of American Orchestras state that this makes the oboe s pitch secure and the piercing sound makes it suitable for tuning. The construction of the reed greatly affects the pitch of the oboe through the differences in its material, variations in length and scrape, and age of reed. Other than the reed, humidity and temperature will also have effects on the pitch. It was established in the orchestra around the middle of 1700 but was usually used in performances with a military disposition. It was not used in symphonies until Beethoven wrote parts for it in his 5th symphony. Michael Janusch, a flute teacher, created the multi-key piccolo. It was like the flute with 6 keys which was traditional at that time.