Short Answer
Overview
Arco is an Italian directive found in musical scores that instructs string players to use the bow rather than plucking the strings. The term is typically written in lower‑case italics and appears in the middle of a passage that may have previously been marked pizzicato (plucked). When a composer wants a change in articulation, dynamics, or timbre, the simple word arco signals the performer to return to the standard bowed technique.
History / Origin
The word “arco” derives from the Italian verb *arcare*, meaning “to bend” or “to arch”, referring to the curved shape of a bow. The practice of indicating bowing in notation emerged in the Baroque era as string technique became more codified. Early examples appear in the works of composers such as Arcangelo Corelli and Johann Sebastian Bach, where the term was used to differentiate bowed passages from the increasingly common pizzicato effects.
How It’s Used
Arco is employed across a wide range of repertoire, from Baroque sonatas to contemporary orchestral works. It appears in the notation for violin, viola, cello, double bass, and occasionally for bowed folk instruments such as the hard‑anger fiddle. The instruction can be combined with other markings—such as dynamics (p, f) or articulation (legato, staccato)—to shape the character of the bowed sound.
Why It Matters
Understanding arco is essential for performers because the switch between pizzicato and bowing dramatically alters timbre, sustain, and expressive potential. Iconic examples include the opening of Beethoven’s “Violin Concerto” where the soloist shifts from pizzicato to arco, and the sustained arco passages in Brahms’s “Cello Sonata”. For listeners, the contrast highlights compositional intent and enriches the listening experience.
Common Misconceptions
Arco means “play loudly”.
Arco only indicates the use of the bow; dynamics are indicated separately.
Arco is a separate technique from legato.
Arco refers to bow usage, while legato describes the smooth connection of notes; arco passages can be legato, staccato, or any other articulation.
The term is used for all string instruments.
While common for violin family instruments, arco is rarely applied to non‑bowed strings such as the guitar, where the concept does not translate.
FAQ
Can arco be used on electric violins?
Yes; the term refers to bowing technique regardless of the instrument’s acoustic or electric nature, provided the instrument is played with a bow.
Is there a specific bow pressure required when switching to arco?
The required bow pressure depends on the desired dynamics and timbre; composers may add further markings (e.g., ‘pizz.’ to ‘arco, m.s.’) to indicate subtle changes.
Do composers ever write ‘arco’ in uppercase?
While the standard practice is lowercase italics, some older manuscripts use uppercase or underline for emphasis, but the meaning remains the same.
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