Guitar Metronome

A metronome is any device that produces regular, metrical ticks (beats, clicks) — settable in beats per minute. These ticks represent a fixed, regular aural pulse; some metronomes also include synchronized visual motion (e.g. pendulum-swing). The metronome dates from the early 19th century, where it was patented by Johann Maelzel in 1815 as a tool for musicians, under the title "Instrument/Machine for the Improvement of all Musical Performance, called Metronome".

Metronomes may be used by musicians when practicing in order to maintain a constant tempo; by adjusting the metronome, facility can be achieved at varying tempi. Even in pieces that do not require a strictly constant tempo (such as in the case of rubato), a metronome "marking" is sometimes given by the composer to give an indication of the general tempo intended, found in the score at the beginning of a piece or movement thereof.

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