Arpeggio (musical technique)

Characteristics and notation

In notation an arpeggiated chord is commonly indicated by a vertical wavy line before the chord, directing the performer to roll the chord from lowest to highest note. Composers may add an arrow or text to indicate the opposite direction. Players control the spacing and speed to shape musical phrasing: a rapid roll can create shimmering texture, while a slow spread emphasizes individual chord tones. On keyboard instruments this effect is produced by finger technique; on plucked instruments it can be executed by fingerpicking, sweep picking or specific right-hand roll patterns.

Types, variations and related devices

• Broken chord: A general term that includes arpeggios but also other non-simultaneous chordal patterns.
• Rolled chord / arpeggiato: Notated with a wavy line; the notes sound in quick succession.
• Inverted and extended arpeggios: Notes may be reordered or stretched across several octaves.
• Electronic arpeggiators: Synthesizers and sequencers can generate repeating arpeggios automatically, producing patterns impractical for human hands.

Arpeggios may appear as single-line figures outlining harmony or as elaborated patterns that imply changing chords. They are fundamental to many accompaniment styles, including fingerstyle guitarists and traditional banjo rolls, and are adapted differently by instruments such as the piano and bowed string instruments.

History and musical examples

The use of arpeggiated textures dates back to early plucked and keyboard instruments; harps and lutes naturally produced them. Baroque keyboard repertoire often relies on broken chords as a structural device: for instance, many preludes and suites by composers such as Bach employ continuous arpeggiated figures to sustain harmonic motion. Later composers expanded the expressive palette: romantic pianists used wide-spread arpeggios for dramatic effect, and twentieth-century writers integrated unconventional arpeggio directions and densities. Some modern composers explicitly mark downward rolls or unusual spreads; examples include requests by Béla Bartók and others to invert the expected direction for special coloristic effects.

Practice, pedagogy and practical uses

Learning arpeggios is a core element of instrument training. Studies and exams commonly require technical proficiency in both scales and arpeggios because they build coordination, fingering economy and aural recognition of chord shapes. Pedagogical routines often pair arpeggio practice with scale work across multiple keys to develop fluency. In ensemble and accompaniment contexts, arpeggios provide rhythmic and harmonic support, while in solo writing they can serve as primary material for melody and texture.

Arpeggios cross stylistic boundaries: they underpin classical keyboard writing, form the basis of many jazz comping patterns, and are core to folk and popular accompaniments. Musicians across a spectrum of musical instruments study them as essential building blocks of technique and expression, and many listeners recognize arpeggiated textures as a defining element of musical motion and color. For broader context on musical concepts see general music resources.

Overall, the arpeggio is a simple idea with wide-ranging consequences: a single chord played in sequence can become accompaniment, virtuosic display, harmonic outline or rhythmic device depending on tempo, articulation and instrumental context.