BPM (music)

In musical terminology, tempo [ˈtɛmpo] ("time" in Italian; plural: tempi [ˈtɛmpi]) is the speed or pace of a given piece.

In classical music, tempo is usually indicated with an instruction at the start of a piece (often using conventional Italian terms). Tempo is usually measured in by beats per minute (BPM). In modern classical compositions a "metronome mark" in beats per minute may supplement or replace the normal tempo marking, while in modern genres like electronic dance music tempo will simply be stated in BPM.

Tempo may be separated from articulation and metre, or these aspects may be indicated along with tempo, all contributing to the overall texture. While the ability to hold a steady tempo is a vital skill for a musical performer, tempo is changeable. Depending on the genre of a piece of music and the performers' interpretation, a piece may be played with slight tempo rubato or drastic accelerando. In ensembles, the tempo is often indicated by a conductor or by one of the instrumentalists, for instance the drummer.

While tempo is described or indicated in many different ways, it is only measured in beats per minute (bpm). For example, a tempo of 60 beats per minute signifies one beat per second, while a tempo of 120 beats per minute is twice as rapid, signifying one beat every 0.5 seconds. The note value of a beat will typically be that indicated by the meter signature. For instance, in 4
4 the beat will be a crotchet or quarter note.

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