It was originated in Western Europe (Belgium, Germany and Netherlands) in the mid-1990s as the breakbeat hardcore production community began to diversify into new and different styles of electronic music. It's often characterized by strong, hard (or even downpitch) kicks, fully resonant basses and an increased amount of reverberation applied to the main beat. Melody varies from 130 to 150 in tempo, and can feature plain instrumental sound in early compositions, with the latter ones tending to implement side-chaining techniques of progressive on digital synthesizers.