It often does not need any accompanying instrument because the performer could play music on keys using the right hand and the accompaniment which has pre-set and bass chord buttons using the left hand. Air flow through reeds is generated by expansion and compression of the accordions bellows. A keyboard or a set of buttons handles which reeds will accept air flow which produces the tones. You might be familiar with the Irish uilleann pipes or the Scottish great highland bagpipe but there are also varieties of bagpipes coming from regions all around the Persian Gulf, Northern Africa, and Europe. Origin The roots of the bagpipes could be dug up to the ancient times. Because any herdsman had all the materials needed which are a reed pipe and sheep or goat skin, bagpipes might have been from a rustic instrument in various cultures. It has the same range as the mandocello and cello and is tuned one octave lower than the tenor banjo. Four-string banjos can be for choral accompaniment and single string tune playing. These can also be for duo style which is a mixture of the rhythm chords and single string tremolo and for chord melody style. In the 1980 s, the headless bass wad developed by Ned Steinberger and the Guild Guitar Corporation introduced the use of silicone rubber strings. Recently, bass guitar producers added digital modeling circuits in the instrument. Classic bass guitars Electric bass guitars has lasted for over 70 years and counting. Never pop or strike it into position. Remember to apply oil on the valves each day you play the tuba. Dismantle the valves one by one, put three oil drops, and place the valves back. You would know that the valve is not in the correct place if you blow hard but the air is blocked. Draw the major tuning slide out to make the tuba longer and thus lower the pitch. Despite that, trombones were not included in the early orchestras because most composers and musicians thought these were solely suitable for solemn melodies. Nowadays, trombones are played in symphony orchestras, military bands, big bands, and brass bans. Aside from those, the trombone is also played in smaller musical ensembles such as brass quartets or trios and trombone quartets or choirs.