On the other hand, the E flat tuba produces sound that is an octave higher than the contrabass tubas and is the customary orchestral tuba in the United Kingdom. The tenor tuba, also called euphonium, is pitched one octave above the contrabass tuba, B flat. B flat valve tubas are sometimes specifically called tenor tuba. There are a lot of theories about the origin of the sitar. Unfortunately, most of which are historically inaccurate and, thus, impossible. The most common theory is that Amir Khusru invented the sitar around 1300 AD. This is a different Amir Khusru from the one stated above. The Amir Khusru of the 1300 AD was a popular personality and is an image for the Hindustani Sangeet. Although Jeff Britting who is an American composer has made a sonatina for it, the instrument did not catch the heat and became an enormously scarce instrument. It is described by The New Groove Dictionary of Musical Instruments as an instrument that sounds the same as a soprano sax yet less pleasant. 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. How to play If you are still learning to play the guitar, it is best to use a fretted bass guitar because it is easier to accurately hit the notes. First, you need to put your fingers into practice. Relax the hand with which you will play the bass guitar and lift it at an angle of 90 degrees. Lift your fingers one at a time in rapid succession. Bassoon history The 16th century ancestor of the bassoon was given many names: fagot for the French, dulcian for the Germans, bajon for the Spanish, curtal for the English, and fagotto for the Italians. This was not made of four separate sections like in the modern bassoon but was made of only one piece of wood.