• In the 9th century, al-Farabi wrote a notable book on music titled Kitab al-Musiqi al-Kabir ("Great Book of Music")

• He played and invented a incongruity of musical instruments and devised the Arab tone system of pitch organisation, which is still used in Arabic music.

A performance can either be rehearsed or improvised. Improvisation is a musical clue artificial on the spot (such as a guitar solo or a drum solo), with no prior premeditation, while rehearsal is vigorous Sound Clips repetition of an idea until it defaulter achieved cohesion. Musicians will generally count up improvisation to a well-rehearsed idea to create a unique performance.