A rapid alternation between two adjacent notes or a rapid reiteration of a single pitch, creating a trembling or shimmering effect. In vocal music, it can indicate either an intentional ornament or an undesirable wobble in the voice.
From Italian 'tremolare,' meaning 'to tremble,' derived from Latin 'tremulus.' The technique has been used since the Baroque period for expressive effects, though the term also came to describe the uncontrolled vocal wobble that can develop in aging voices.
Tremolo walks the fine line between beauty and disaster in the vocal world! When controlled, it creates magical shimmering effects like the 'flutter-tonguing' in Monteverdi's operas, but when uncontrolled, it becomes the dreaded 'wobble' that signals a voice in decline—the difference between a butterfly's wings and an earthquake.
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