Viola

The viola, or bowed viola, is the contralto bowed string instrument of the orchestra. Morphologically, it resembles a violin but has slightly larger proportions (with a soundbox typically between 38 and 43 centimeters in length). It has four strings tuned in perfect fifths (C, G, D, A), positioned exactly a fifth below the violin and an octave above the cello.

Acoustically, the sound comes from the friction of the bow on the strings. The acoustics of the viola are defined by an unavoidable physical compromise: to be played comfortably on the shoulder, its size has historically remained restricted. Consequently, its soundbox is too small to amplify the lowest frequencies of the C string with full efficiency. This structural peculiarity gives the viola an unmistakable timbre, dark, veiled, and slightly nasal, contrasting intensely with the bright and penetrating projection of the violin.

Historically, the viola emerged in northern Italy during the 16th century, along with the rest of the violin family. Although once frequently relegated to mere orchestral harmonic filler, its status emancipated during the Classical period through chamber music. In the 20th century, it definitively established itself as a robust and expressive solo concert instrument.