techno: Techno is pure electronic music, originally designed for dances, that combines the sound of classic German electronica with an american Urban feel. The music emphasizes the machine sound of electronic drum machines, especially the Roland TR-808, and often is based around repetitive riffs played on bass line sequencers like the Roland TB-303.
The history of techno starts in Detroit. The style emerged there when musicians took cheap, used electronic instruments and abused them in ways never intended by their creators. Early techno artists drew on science fiction and futuristic themes in their music. The techno sound depicted a place unlike the aging Detroit city where it was born. The music and the themes of the songs were intended to sound like something from the future. “It’s an attitude to making music that sounds futuristic,” according to techno pioneer Juan Atkins, “something that hasn’t been done before.”
One of the best known early techno songs is "Alleys of your Mind", by techno artists Cybotron. Works from Atkins, May and Saunderson didn't make the charts, but were very influential because they were played in major clubs in the US. In 1988, a compilation called Techno! The New Dance Sound helped define the style.
In the 90's, artists in Europe began to take the Detroit sound of early techno songs and morph it. New variations were created, including acid, ambient techno, hardcore, and jungle. The techno style has gained more popularity in Europe than it has in the United States, because electronica has been popularized more in Europe than in the US.
Techno has been associated with raves since the nineties. The idea of a rave is just a techno party where like-minded techno fans can get together and dance to continuous dj mixes of electronic music. These have been particularly popular in Europe. In 2000, the Detroit Electronic Music Festival became one of the largest and most significant electronica events in the world. It was free and attracted hundreds of thousands of techno music fans from all over the world.
trance:During the 1990s, trance music became part of the club scene in a number of counties around Europe, especially in Germany. The popularity of the genre in Frankfurt was so pronounced that there are many musical experts who trace the origin of trance music with vocals to that city. The pattern for vocals usually took a course of being somewhat uplifting in nature, rather than addressing social issues or focusing on story lines that tended to focus on negative emotional subjects, such as broken hearts.
Trance music offered an alternative to the techno and house music of the era, in that the genre was thought to be a musical style that was intended to help revitalize people, rather than be a vehicle for perpetuating stereotypes or promoting political agendas. Since the beginning of the 21st century, trance music has captured audiences on a global basis, with record labels, clubs, and radio outlets around the world.
Today, the general positive attitude of trance music remains a positive music form that attracts a number of fans. The musical compositions are often produced with a combination of traditional instruments used in conjunction with a musical synthesizer. Many of the most popular trance music artists today have tended to structure the recordings so that the sound has more in common with more mainstream pop, which has helped trance music to be more accessible to the general public.
house: is a style of electronic dance music that was developed in African-American communities of Chicago (see Chicago house), influenced by early to mid-1970s dance music as spun by DJs in Chicago and spread to Detroit, New York, and eventually Europe. House music is strongly influenced by elements of the early to mid 1970s soul- and funk-infused dance music style of disco. House music takes disco's use of a prominent bass drum on every beat and developed a new style by mixing in a heavy electronic synthesizer bassline, electronic drums, electronic effects, funk and pop samples, and reverb- or delay-enhanced vocals.