Legato Mark (Music Notation)

Overview

The legato mark is a curved line, known as a slur, drawn above or below a group of notes to indicate that they should be performed in a connected, seamless manner. Unlike a staccato, which calls for separation, legato requires the performer to sustain each pitch until the next begins, creating a flowing line of sound. The effect is achieved through finger, breath, or bow techniques that minimize the attack and release of each note, depending on the instrument.

In practical terms, legato articulation shapes phrasing, supports melodic contour, and often conveys a lyrical or expressive character. While the visual symbol is the same across most Western notation, its execution varies: pianists employ legato fingerings, string players use bow changes, and wind players rely on breath control and tonguing.

How It’s Notated

The legato mark is drawn as a single, smooth curve that begins at the first notehead of a phrase and ends at the last. It is placed above the staff for notes on the middle line or lower, and below the staff for notes on the upper line or higher, to avoid colliding with other symbols. When the notes have stems, the slur typically arches over stems that point upward and under stems that point downward; however, the curve may be adjusted to avoid intersecting other articulations, dynamics, or lyric text. In polyphonic textures, separate slurs may be used for each voice, and overlapping slurs are allowed as long as they remain distinct.

How It’s Performed

When a performer sees a legato slur, they aim to produce a continuous sound line. Pianists use finger legato, selecting fingerings that allow one finger to stay on the key while the next finger depresses the following note, often employing the sustain pedal for additional smoothness. String players coordinate bow placement and pressure to avoid audible gaps, often using a single bow stroke for the entire slurred passage. Wind players shape the airflow and adjust tonguing—using minimal or no tongue articulation—to connect notes. The exact technique depends on the instrument’s mechanics, but the overarching goal is an uninterrupted melodic flow.

Origin

The slur as a legato indication traces back to the late Renaissance, when Italian composers such as Giovanni Pierluigi da Palestrina used curved lines to denote smooth vocal delivery. By the Baroque era, the symbol had become standardized in keyboard and string music, largely through the works of Johann Sebastian Bach and his contemporaries. The modern, uniform slur shape was solidified in the 19th‑century editorial practices of publishers like Breitkopf & Härtel, who codified its placement rules in early notation manuals.

Where You’ll See It

Legato marks appear in virtually all genres that employ Western staff notation, from Classical symphonies to contemporary pop piano scores. They are especially prevalent in lyrical passages of the Classical and Romantic periods, in vocal music where phrasing is paramount, and in jazz lead sheets where a smooth melodic line is desired. While the symbol itself is universal, its frequency can vary: Baroque keyboard music often uses fewer slurs than Romantic piano literature, which frequently employs long, expressive legato phrases.

Common Misconceptions / Confused Symbols

Because several articulation symbols look similar, beginners often confuse legato slurs with other markings. Clarifying these differences helps performers apply the correct technique.

• Misconception: A slur always indicates a tie.
  Correction: A slur connects different pitches for legato articulation, whereas a tie connects identical pitches to prolong their duration.
• Misconception: Legato and tenuto are interchangeable.
  Correction: Tenuto (a horizontal line) suggests slight emphasis or holding of a note, but does not require the notes to be connected; legato demands a seamless transition.
• Misconception: A staccato dot placed inside a slur cancels the legato.
  Correction: The dot still indicates a short, detached articulation; when combined with a slur, it creates a mixed articulation that must be interpreted according to the composer’s intent.
• Misconception: A slur on a single note signals a grace note.
  Correction: Grace notes are notated with smaller noteheads and a slash; a slur on a single note is unusual and typically indicates a phrasing cue rather than a separate articulation.
• Misconception: Legato means “play as loudly as possible.”
  Correction: Legato concerns the connection between notes, not dynamics; volume is indicated by separate dynamic markings.