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One drop rhythm is a drumset playing style of reggae, popularized by Carlton Barrett (long-time drummer of Bob Marley and the Wailers and The Upsetters), in which the backbeat is characterized by the dominant snare drum stroke (usually a rim shot) and bass drum both sounding on the third beat of every measure in 4/8 time (counting in 4/4 time, the drummer would leave beats one and three open), while beat one is left empty. The high hat becomes the predominant instrument in this style, creating a clean sound that leaves large open musical space for the rhythmic and improvisational contributions of other instruments such as guitar and organ.