beat (music)

A beat is a pulse on the beat level, the metric level at which pulses are heard as the basic unit. Thus a beat is the basic time unit of a piece; for every tick on a metronome, each tick is a beat. Depending on the context, beat may denote eitherthe onset of the corresponding time unit, a point in time, the very moment when the metronome ticks, orthe complete time interval between two consecutive taps, so to say, orin popular music, the whole sequence of individual beats (in the sense of meter, rhythm, Groove, or riddim).Much music is characterised by a sequence of stressed and unstressed beats (often called "strong" and "weak") organised into a meter and partially indicated by a time signature, the speed of which is determined by a tempo. In the context of a time signature, the term "beat" most often refers to the bottom number — so in 3/4, most people would consider the beat to be the 4; that is, a quarter-note, or  crotchet. Musicians typically find that mentally counting a regular series of beats enables them to keep synchronised even if the music is not characterised by regular rhythm.
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Beat, also known as Merseybeat (for bands from Liverpool), Brumbeat (for bands from Birmingham) etc., is a pop music genre that evolved in the UK in the early 1960s. Beat groups characteristically had simple guitar-dominated line-ups, with vocal harmonies and catchy tunes. Beat music has little to do with the Beat generation literary movement of the 1950s, and more to do with driving rhythms, which the bands had adopted from their R&B/soul influences.
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