The instrument was constructed with double keyboards to control varied string choirs which makes it more musically flexible. The Shudi and Kirkman firms in England manufactured harpsichords that had great sonority and power while German builders added two foot and sixteen foot choir which expanded its repertoire. To understand this better, picture out the violin which is sometimes regarded as a fingerboard lyre compared to the piano which is a keyed zither. On the other hand, organologists all around the world has come to an agreement that harps are completely different from the lyre and zither. Zithers and lyres have strings that are fastened to at least a point on the tailpiece or wrest pins near the soundboard and lie parallel to it. The transformation of the bowl-back style of the mandolin to the flat-back is credited to Orville Gibson. In the 20th century, the mandolin was prominently used for bluegrass, classical, and jazz music. The mandolin family The few other members of the mandolin family are the mandola, mando-bass, octave mandolin, piccolo, mandocello, and cittern. Concertinas have an unusual shape with sides that range from four to twelve in number. The chromatic accordion can play a chromatic scale with 46 notes and is most popular in Russia where it is called Bayan. Piano accordions range from twelve bass to one hundred sixty bass which are respectively 20 key up and 45 key. Acoustic guitar care The best way to keep the acoustic guitar from accumulating dirt is using a case for storage protection but you could also use a cover. Choose a guitar cover that is easy to take off and put on and has a fabric material. To avoid sweat marks on your guitar, you could wear a sweat band when playing. Traditionally, it has eight to sixteen holes in intervals of two. The regular chromatic harmonica uses the slide to produce some of the notes in a complete chromatic scale which is recurring at each octave. Diatonic harmonicas are intended in only play in a particular key. It is more simple to learn the C, G, and A scales.