rock

Rock music is a genre of popular music which emerged publicly in the mid 50s. Roots derived from rhythm and blues, country music from years 40 and 50s as well as various other influences. Furthermore, also took the rock music from a variety of other musical styles, including folk music (folk music), jazz and classical music.
Sounds typical of rock music often revolves around an electric guitar or acoustic guitar, and use a very subtle back beat on the rhythm section with bass guitar and drums, and keyboards such as organ, piano or since the 70s, the synthesizer. Besides the guitar or keyboards, saxophone and blues-style harmonica is sometimes used as a musical instrument solo. In its pure form, rock music "has three chords, bakcbeat consistent and striking and interesting melody."
In the late 60's and early 70's, rock musk develop into several types. Mixed with folk music (folk music in America) to folk rock, with blues to blues-rock and with jazz, a jazz-rock fusion. In the 70s, combining rock influences from soul, funk, and Latin music. Also in the 70s, rock evolved into various subgenres (sub-categories) such as soft rock, glam rock, heavy metal, hard rock, progressive rock, and punk rock. Sub category 80's rock the protruding ditahun including New Wave, hardcore punk and alternative rock. In the 90s there were grunge, Britpop, indie rock and nu metal.
A musician who specializes kelompuk play rock music called rock band or rock group (rock band). Rock group that consists of many guitar players, lead singer (lead singer), bass guitar player, and drummer (drummer), forming a quartet. Some of the group took one or two positions above and / or use the main pennyanyi as players of musical instruments in addition to singing, forming a duo or trio. Another group has additional musicians like two rhythm guitars and / or a keyboardist (keyboard player). Somewhat less frequently, the use of stringed musical instruments such as violin, cello or inflatable devices such as saxophone, trumpet or trombone.