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Duo for Violoncelli

by Arlene Sierra

Instrumentation
Cello Ensemble
Composed
1993
Duration
5'
Publisher
Cecilian Music

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About this piece

A five-minute duo for two cellos from 1993, dedicated to Arlene Santana. Slow 'Misterioso' passages of sustained, non-vibrato double stops frame a lyrical 'Supplicando' section, in which the two cellos trade a soaring line and broken-chord accompaniment, and a restless 'Agitato' in constantly changing meters, where one part's measured tremolo and pizzicato harmonics drive the other's line. The two parts are equally demanding, so it suits a pair of advanced students or a teacher and student.

Technical overview

Both cellists move between bass, tenor and treble clefs, with cello I going up to F5 in thumb position, and play double stops and chords, natural and pizzicato harmonics, left-hand pizzicato, glissandi and measured tremolo. The atonal writing runs through frequent meter changes (3/8, 5/8, 7/8, 2/8) that call for close ensemble coordination.

Technical focus

  • Double Stops
  • Thumb Position
  • Pizzicato
  • Harmonics
  • Meter Changes
  • Tempo Changes
  • Ensemble Skills
  • Accidentals
  • Hairpin Dynamics
  • Articulation

Level rubric

Advanced

Left Hand

  • Unrestricted fingerboard operation.
  • Effortless high‑register passages with thumb position.
  • Execute large leaps, rapid shifts & fast runs with precise intonation.
  • Render double stops with clarity and even vibrato.
  • Crisp, stylistically appropriate ornamentation (trills, turns, mordents).
  • Instinctive micro‑adjustments in intonation for expressiveness.
  • False harmonics in low positions

Right Hand

  • Complete command of all bow strokes at any tempo/dynamic.
  • Comfortable execution of virtuoso passages (sautillé, intricate ricochet).
  • Tone projection from whisper‑quiet to fortissimo.
  • Integrate advanced bow patterns with expressive phrasing.
  • Demonstrate technical precision with a broad dynamic range.

Rhythm & Musicality

  • Interpret large‑scale structures with nuanced pacing and rhythmic freedom.
  • Highly refined phrasing with subtle note grouping & expressive rubato.
  • Convey emotional depth and stylistic authenticity.
  • Incorporate personal interpretive choices while meeting stylistic demands.

Levels are approximate guides, not strict requirements.