Bar line (music)

A bar line is a vertical line on a musical staff that divides the staff into measures, indicating the regular rhythmic grouping defined by the time signature. It helps performers keep tempo, locate places in the score, and signals structural boundaries such as phrase ends or repeats.

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Tremolo (music)

Tremolo is a musical effect that creates a rapid repetition of a single note or a rapid alternation between two notes, producing a trembling sound. It is indicated by specific notation symbols and is used across a wide range of instruments and musical styles.

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Trill (music)

A trill is a rapid alternation between two adjacent notes, typically a semitone or whole tone apart, used as an ornament in various musical styles. It is notated with a wavy line and often a small note indicating the starting pitch.

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