Concept

Vibrato

Summary

Vibrato (Italian, from past participle of "vibrare", to vibrate) is a musical effect consisting of a regular, pulsating change of pitch. It is used to add expression to vocal and instrumental music. Vibrato is typically characterised in terms of two factors: the amount of pitch variation ("extent of vibrato") and the speed with which the pitch is varied ("rate of vibrato"). In singing it can occur spontaneously through variations in the larynx. The vibrato of a string instrument and wind instrument is an imitation of that vocal function. Vibrato can also be reproduced mechanically (Leslie speaker) or electronically as an audio effect close to chorus. Descriptions of what would now be characterised as vibrato go back to the 16th century. However, no evidence exists of authors using the term vibrato before the 19th century. Instead, authors used various descriptive terms interchangeably, including tremolo, bebung, or tremblement, or descriptions such as wavering, shake or trillo. These “terminological uncertainties” continue to pervade modern definitions of vibrato. The terms vibrato and tremolo are sometimes used interchangeably, although (in the classical world) they are properly defined as separate effects. Vibrato is defined as a periodic variation in the pitch (frequency) of a musical note that is perceived as one fundamental frequency. Tremolo, on the other hand, is defined as a fast repetition of the same note (usually a semiquaver) or alternation between two notes, especially on instruments which do not have the ability of producing long sustained notes, such as the guitar (for instance tremolo picking). Presently, the leading understanding is that when vibrato is utilised, listeners are able to focus on the average pitch and hear it as a single fundamental as opposed to the alternation between two different fundamental frequencies.

Official source

https://en.wikipedia.org/wiki/Vibrato

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