The roots of hip hop can be traced back to the 1970s. As a style its development coincided with the development of the early drum machines such as the TR 808.
There was also extensive use made of turntables incorporating beat-matching. Vocals began to be added to the textures in the form of rapping.
Around late 1992 to early 1993 , there was a change starting in the mainstream radio playlists. While the sexual lyrics of techno and hip-hop still dominated the airwaves, a new style of rock music was making an impact. Bands like Pearl Jam and Soundgarden were offering youngsters a new type of rock music to listen to that contained catchy lyrics about the angst and trials of teenage years. These songs also seemed to send a message about the status quo of society and the helplessness that was felt among the teens and early adults of the era. Songs like Nirvana’s “Smells Like Teen Spirit” spoke about a teen revolution in a seemingly meaningless world. The song also marked the beginning of the grunge and alternative rock phase that remained popular throughout the mid-1990s.