Viol - Construction

Construction

Viols most commonly had six strings, although many 16th-century instruments had five or even four strings. Viols were (and are) strung with gut strings of lower tension than on the members of the violin family, let alone the steel strings mostly used there today. Gut strings produce a sonority far different from steel, the former generally described as softer and sweeter. Around 1660, gut or silk core strings overspun with copper wire first became available; these were then used for the lowest-pitched bass strings on viols, and on many other string instruments as well.

Viols are fretted in a manner similar to early guitars or lutes, by means of movable wrapped-around and tied-on gut frets. A low seventh string was supposedly added in France to the bass viol by Monsieur de Sainte-Colombe (c. 1640–1690), whose students included the French gamba virtuoso and composer Marin Marais. Also, the painting Saint Cecilia with an Angel (1618) by Domenichino (1581–1641) shows what may be a seven-string viol.

Unlike members of the violin family, which are tuned in fifths, viols are usually tuned in fourths with a major third in the middle, mirroring the tuning employed on the vihuela de mano and lute during the 16th century and similar to that of the modern six-string guitar.

Viols were first constructed much like the vihuela de mano, with all surfaces, top, back, and sides made from flat slabs or pieces of joined wood, bent or curved as required. However, some viols, both early and later, had carved tops, similar to those more commonly associated with instruments of the violin family. The ribs or sides of early viols were usually quite shallow, reflecting more the construction of their plucked vihuela counterparts. Rib depth increased during the course of the 16th century, finally coming to resemble the greater depth of the classic 17th-century pattern.

The flat backs of most viols have a sharply angled break or canted bend in their surface close to where the neck meets the body. This serves to taper the back (and overall body depth) at its upper end to meet the back of the neck joint flush with its heel. Traditional construction uses animal glue, and internal joints are often reinforced with strips of either linen or vellum soaked in hot animal glue—a practice also employed in early plucked vihuela construction. The peg boxes of viols (which hold the tuning pegs) were typically decorated either with elaborate carved heads of animals or people or with the now familiar spiral scroll finial.

The earliest vihuelas and viols, both plucked and bowed, all had sharp cuts to their waists, similar to the profile of a modern violin. This is a key and new feature—first appearing in the mid-15th century—and from then on, it was employed on many different types of string instruments. This feature is also key in seeing and understanding the connection between the plucked and bowed versions of early vihuelas. If one were to go searching for very early viols with smooth-curved figure-eight bodies, like those found on the only slightly later plucked vihuelas and the modern guitar, they would be out of luck. By the mid-16th century, however, "guitar-shaped" viols were fairly common, and a few of them survive.

The earliest viols had flat, glued-down bridges just like their plucked counterpart vihuelas. Soon after, however, viols adopted the wider and high-arched bridge that facilitated the bowing of single strings. The earliest of viols would also have had the ends of their fretboards flat on the deck, level with or resting upon the top or sound board. Once the end of their fretboards were elevated above the top of the instrument's face, the entire top could vibrate freely. Early viols did not have sound posts, either (again reflecting their plucked vihuela siblings). This reduced damping again meant that their tops could vibrate more freely, contributing to the characteristic "humming" sound of viols; yet the absence of a sound post also resulted in a quieter and softer voice overall.

It is commonly believed that C-holes (a type and shape of pierced sound port visible on the top face or belly of string instruments) are a definitive feature of viols, a feature used to distinguish viols from instruments in the violin family, which typically had F-shaped holes. This generality, however, renders an incomplete picture. The earliest viols had either large, open, round, sound holes (or even round pierced rosettes like those found on lutes and vihuelas), or they had some kind of C-holes. Viols sometimes had as many as four small C-holes—one placed in each corner of the bouts—but more commonly, they had two. The two C-holes might be placed in the upper bouts, centrally, or in the lower bouts. In the formative years, C-holes were most often placed facing each other or turned inwards.

In addition to round or C-holes, however, and as early as the first quarter of the 16th century, some viols adopted S-shaped holes, again facing inward. By the mid-16th century, S-holes morphed into the classic F-shaped holes, which were then used by viols and members of the violin family alike. By the mid- to late 16th century, the viol's C-holes facing direction was reversed, becoming outward facing. That configuration then became a standard feature of what we today call the “classic” 17th-century pattern. Yet another style of sound holes found on some viols was a pair of flame-shaped Arabesques placed left and right. The lute and vihuelalike round or oval ports or rosettes became a standard feature of German and Austrian viols and was retained to the very end. That feature or “genetic marker” was exclusively unique to viols and reminded one always of the viol's more ancient plucked vihuela roots, the "luteness" of viols.

Historians, makers, and players generally distinguish between Renaissance and Baroque viols. The latter are more heavily constructed and are fitted with a bass bar and sound post, like modern stringed instruments.