Trance is a style of electronic music that developed in the 1990s in Germany and the UK. Arguably trance is a fusion of ambient music, techno and house and it shares much in common with techno in terms of tempo and rhythm but it features a more melodic edge. The melodies in trance differ from house in that they tend to be more emotional and uplifting. Like techno and house, Trance is characterized by a 4/4 kick drum signature (a kick drum every quarter note of a bar). It generally has a tempo of between 130 and 160 beats per minute (BPM). Trance music is famous for its crescendos and breakdowns. Hi hats in trance are generally on the off-beat and major transitions, builds ups and climaxes are often introduced with a lengthy snare roll. Frankfurt, Germany is often said to be the birthplace of trance as some of its earliest pioneers hailed from the city including Jam El Mar, Oliver Lieb and Sven Väth. But back in 1988 British acid house group The KLF defined the term 'trance' on their record 'What Time Is Love'. By the mid-1990s, trance producers began to experiment with more anthemic basslines and harmonic lead melodies, and as a result the genre entered the mainstream. This in turn led to the development of commercial trance music, with vocals playing an integral part in the popularization of the sound. Trance is said to be a 'big room sound' because of its ability to move a large amount of people and the genre's most popular DJs will often play to audiences numbering tens of thousands in stadiums and at festivals